IW 900 Series Product Technical Manual Manufactured from Dec 2014 onwards Rev D April 2017.pdf
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Infant Warmer
Product Technical Manual (PTM)
Manufactured from December 2014
onwards
IW910 Baby Control Mobile Infant Warmer
IW920 Manual Control Mobile Infant Warmer
IW930 Series Baby Control CosyCot™ Infant Warmer
IW950 Series Manual Control CosyCot™ Infant Warmer
IW980 Baby Control Wall Mount Infant Warmer
IW990 Manual Control Wall Mount Infant Warmer
IW900 Series Infant Warmer Accessories
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PTM REVISION HISTORY
FPH Internal Use Only - Created using template TMP-230_a. Refer to TRS-241 for the Verification of Understanding.
REVISION
DATE
DESCRIPTION OF PTM CHANGE
A
November / 2014
First release
B
February / 2016
C
July / 2016
Proposition 65 Material Statement added
D
April / 2017
Update Australia Office Address
US and Canadian certifications removed, AU/NZ RCM symbol added.
EMC immunity value added for 120V model Infant Warmers.
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Intended Use (including indications for use)
The IW900 series Infant Warmers are designed to provide warmth to infants in the first few
weeks of life, when an infant's self-thermoregulation capacity may be reduced, or if external
thermal support is required or desirable. This may include neonates (including premature/low
birth-weight neonates) in Labor and Delivery (L&D) Room applications, thermal support of
premature/low birth-weight neonates and critically ill infants in neonatal intensive care units
(NICUs) and thermal support of infants/pediatrics less than 10kg in hospital nurseries.
Situations which necessitate unobstructed access to an infant or neonate, including during
resuscitation or surgical procedures, may indicate the need for a radiant heat source instead
of equivalent support devices such as infant incubators. The IW900 series warmers may
therefore also be used in the Operating Room.
The IW930/IW950 series Infant warmers are additionally intended to be used for intrahospital transport between the above-stated specialist treatment areas.
The IW900 series infant warmer is not designed or intended to be used outside of the
hospital environment. The IW900 series infant warmer is not designed or intended to be used
in ambulatory vehicles.
CAUTION
Only competent individuals trained in the repair of this equipment should attempt to service it.
Any servicing of the equipment should be as detailed in this manual.
Detailed information for more extensive repairs is included in the service manual solely for
the convenience of users having proper knowledge, tools and test equipment, and for service
representatives trained by Fisher & Paykel Healthcare.
Fisher & Paykel Healthcare has a policy of continued product improvement and reserves the
right to alter specifications without notice.
This Service Manual is valid for warmers manufactured from December 2014 onwards. For
Infant Warmers & accessories manufactured prior to this date refer to 185045312 (June 2008
– December 2014) or 185041130 (Pre-June 2008).
Warranty
Subject to any agreement to the contrary, Fisher & Paykel Healthcare warrants that the
products described in this manual (excluding any consumables which may form part of such
product or therapy delivery system), when used in accordance with its instructions for use
shall be free from defects in workmanship and materials and will perform in accordance with
Fisher & Paykel Healthcare’s official published product specifications for a period of one year
from the date of shipment. This warranty does not cover damage caused by accident, misuse
or abuse, modification, failure to follow instructions for use, an unsuitable physical or
operating environment, failure caused by a product not supplied or manufactured by Fisher &
Paykel Healthcare, other defects not related to materials or workmanship or any failure to use
original spare parts. Warranty claims can only be made when accompanied by proof of
purchase (i.e. a sales receipt).
If this warranty applies to a defective product, Fisher & Paykel Healthcare will, to the extent
permitted by law, at its option, repair or replace the product or the defective material or part. If
Fisher & Paykel Healthcare repairs or replaces any product, the warranty period for any
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product repaired or replaced does not extend beyond the original warranty period. This
warranty is your exclusive warranty. Fisher & Paykel Healthcare excludes all implied
conditions and warranties except any implied condition or warranty the exclusion of which
would contravene any law or cause any part of this warranty to be void. To the fullest extent
permitted by law, Fisher & Paykel Healthcare disclaims all liability for special, incidental,
indirect or consequential damages (including but not limited to, loss of profits) arising from
the sale or use of any of the products described in this manual. This warranty does not
exclude or limit the application of any provision of law where to do so would contravene that
law or cause any part of this warranty to be void.
Copyright © 2014 Fisher & Paykel Healthcare Ltd.
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Contents
Part 1:
Symbols & Definitions ...........................................................................................................7
Part 2:
Operation and General Information .....................................................................................8
2.1
2.2
2.3
2.4
2.5
2.6
Product Overview .....................................................................................................................8
Heater Power Control ..............................................................................................................9
Control Panel .........................................................................................................................10
Alarms ....................................................................................................................................11
Information Mode ...................................................................................................................12
Error Codes ............................................................................................................................13
Part 3:
Specifications .......................................................................................................................15
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
IW910 and IW920 Mobile Infant Warmers .............................................................................15
IW93x and IW95x CosyCot™ Infant Warmers ......................................................................16
IW980 and IW990 Wall Mount Infant Warmers .....................................................................17
Environmental Specifications .................................................................................................18
Equipment Classifications ......................................................................................................18
Standards and Approvals.......................................................................................................18
Materials Statement ...............................................................................................................18
EMC .......................................................................................................................................19
Warmer Identification .............................................................................................................23
Part 4:
Maintenance and Servicing ................................................................................................24
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
Maintenance Schedule ..........................................................................................................24
Safety Check ..........................................................................................................................24
System Check ........................................................................................................................25
Functional Check ...................................................................................................................27
Recommended Maintenance Checklist .................................................................................28
Accessory Weight Reference List ..........................................................................................29
Service Procedures- Replacement ........................................................................................31
Service Procedures – Adjustment .........................................................................................33
Part 5:
Cleaning ................................................................................................................................34
5.1
General Cleaning ...................................................................................................................34
Part 6:
IW900 Series Electronics ....................................................................................................36
6.1
6.2
6.3
6.4
6.5
Troubleshooting Flow Chart ...................................................................................................36
Circuit Overview .....................................................................................................................36
Circuit Description ..................................................................................................................38
PCB Component Locations....................................................................................................40
Circuit Schematics .................................................................................................................43
Part 7:
Head and Column ................................................................................................................55
7.1
7.2
7.3
7.4
7.5
7.6
Head Assembly ......................................................................................................................55
IW900 Controller Assembly ...................................................................................................58
Power Cords ..........................................................................................................................59
IW910/920 Mobile Column Assembly ....................................................................................60
IW93x/95x CosyCot™ Column Assembly .............................................................................62
IW980/990 Wall Mount Column Assembly ............................................................................64
Part 8:
IW93x/95x CosyCot™ Bassinet ..........................................................................................66
8.1
8.2
8.3
8.4
Bassinet Assembly (IW93x & IW95x) ....................................................................................66
Bassinet Arms and Brake Assembly ......................................................................................68
Bassinet Transport Handle Assembly....................................................................................70
Bassinet Side Panel Assembly (IW93x & IW95x) ..................................................................71
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Part 9:
IW93x/95x CosyCot™ Base Assembly ..............................................................................78
Part 10: Gas Accessories ..................................................................................................................82
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
10.10
10.11
10.12
10.13
10.14
10.15
10.16
Gas Fitting Identification ........................................................................................................82
Gas Accessory Service Information .......................................................................................83
900IW101/103/105 Oxygen Gas Supply Modules .................................................................85
900IW102/104/106 Oxygen/Air Gas Supply Modules ...........................................................87
900IW110/111/112/113 Flowmeter Modules .........................................................................90
900IW115/116/117/117G/118/118Y Single Flowmeters .......................................................93
900IW121/123 Venturi Suction Units .....................................................................................96
900IW130x NeopuffTM module .............................................................................................97
900IW15X Gas Accessory Blocks .........................................................................................98
900IW16X Low Pressure Gas Modules ...............................................................................101
900IW171 Oxygen Regulator ..............................................................................................105
900IW172 Air Regulator.......................................................................................................106
900IW181/182/183 Suction Block ........................................................................................107
900IW309 Suction Canister Mounting Block .......................................................................108
900IW310 Dual Cylinder Rack .............................................................................................109
900IW311 Single Cylinder Rack ..........................................................................................110
Part 11: General Accessories .........................................................................................................111
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
11.10
11.11
11.12
11.13
11.14
11.15
11.16
900IW001 DuoSense™ Skin Sensor ...................................................................................111
900IW003 Single Use Sensor Adaptor ................................................................................113
900IW205 X-Ray Tray .........................................................................................................114
900IW230 neoweigh™ Infant Scales ...................................................................................115
900IW301 Short Mounting Pole ...........................................................................................116
900IW302 Long Mounting Pole ...........................................................................................117
900IW303 Mounting Block ...................................................................................................118
900IW305 Hook Cable / Hose IW2G ...................................................................................119
900IW306 Accessory Hook IW2G .......................................................................................120
900IW313 Quad Hook IV Pole .............................................................................................121
900IW314 neoBLUE® mini (phototherapy) mounting bracket.............................................122
900IW312A/J UPS Mounting Kit for CosyCot™ Infant Warmers ........................................123
900IW401 Side Shelf ...........................................................................................................127
900IW408 Storage Drawer System .....................................................................................128
900IW510 neoBLUE® mini ..................................................................................................129
900IW520 neospot™ Infant Procedure Light ......................................................................130
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PART 1: SYMBOLS & DEFINITIONS
Follow Instructions For Use – Safety
Baby Mode (Servo mode)
Consult Instructions For Use
Manual Mode
Warning: Electric Shock Hazard
Timer
Alternating Current
Light
Power On
(connect to the mains power supply)
Audio Pause (alarm silence)
Power Off
(disconnect from the mains power
supply)
25%
25% power level
(Prewarm or Standby Mode)
Power On (only for part of equipment)
Check Baby
Power Off (only for part of equipment)
High Temperature Alarm
Electrical Input
Low Temperature Alarm
Gas Inlet
Sensor Disconnect
Gas Outlet
Power Disconnect
Heater
Temperature Sensor
Contact your local distributor to recycle
waste electronic goods responsibly
Sensor Temperature ºC
Caution: ESD sensitive
Type BF Applied Part
Type B Applied Part
Warning Statement
Caution Statement
Note Statement
WARNING
A WARNING statement refers to the conditions when the possibility of
injury to the patient or user exists if a procedure is not followed
correctly.
CAUTION
A Caution statement indicates the possibility of damage to the
equipment exists if a procedure is not followed correctly.
NOTE:
A Note statement provides additional information intended to clarify
points, procedures or instructions.
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PART 2: OPERATION AND GENERAL INFORMATION
2.1
PRODUCT OVERVIEW
INTRODUCTION
The Fisher & Paykel range of radiant warmers is specifically designed
to provide a controlled source of warmth to Neonates.
MODELS
The IW910 Baby Control and IW920 Manual Control Mobile Infant
Warmers provide mobile and height adjustable warming wherever
needed.
The IW930 Series Baby Control and IW950 Series Manual Control
CosyCot™ Infant Warmers combine an integrated bassinet and
mobility base in four options:
IW931 Standard Size Bassinet & Mattress – Preset Base
IW932 Standard Size Bassinet & Mattress – Electric Elevator Base
IW933 Long Bassinet & Mattress – Preset Base
IW934 Long Bassinet & Mattress – Electric Elevator Base
IW951 Standard Size Bassinet & Mattress – Preset Base
IW952 Standard Size Bassinet & Mattress – Electric Elevator Base
IW953 Long Bassinet & Mattress – Preset Base
IW954 Long Bassinet & Mattress – Electric Elevator Base
To these base models optional accessories can be added to suit
your own particular warming needs
The IW980 Baby Control and IW990 Manual Control Wall Mount Infant
Warmers provide discrete and convenient space saving warming.
In Baby Mode (IW910, IW93x, & IW980 only), the infant warmers
provide stable control of the baby's skin temperature by automatically
adjusting the heater power to compensate for varying physiological
and environmental conditions. This is achieved using a
microprocessor which measures and updates the baby’s temperature
ten times every second.
HEAT CONTROL
In Manual Mode, all infant warmers provide user-adjustable heater
power and the option to monitor the baby’s skin temperature using the
DuoSense™ skin sensor.
In Prewarm Mode all models provide alarm and trouble-free prewarming of the heater.
DUOSENSE™ SKIN SENSOR
Safety is further enhanced by DuoSense™ skin sensor. This sensor
measures the desired skin temperature using two independent
sensors. These sensors are continuously compared to ensure
accurate and reliable skin temperature measurements.
OPERATING MANUAL
This service manual is intended to be used in conjunction with the
IW900 Series Operating Manual (185048344) and Installation and
Assembly Instruction Sheets (see part numbers below). The operating
manual & assembly instructions sheets must be read thoroughly and
all instructions, warnings, cautions and notes thoroughly understood
by all personnel working with warmers prior to use.
Assembly Instruction Sheets:
185044970
185043341
185045314
185044973
IW900 Series Service Manual
Manufactured From December 2014
Mobile
CosyCot™
CosyCot™ in crate
Wall Mount
PART NUMBER
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ISSUE NUMBER
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(IW910/920)
(IW930/950)
(IW930/950)
(IW980/990)
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2.2 HEATER POWER CONTROL
2.2.1 MODES OF POWER CONTROL
2
PREWARM MODE
Power is fixed at 25% (total irradiance at 68 cm < 10 mW/cm ). This
is sufficiently low that minimal alarms need to be active but
sufficiently high that the heating element will keep warm and be
ready for immediate use.
MANUAL MODE
Power is adjustable in the range 0% to 100% in 5% steps.
BABY/SERVO MODE
Power is automatically controlled according to the measured skin
temperature to achieve the desired set temperature. The set
temperature is adjustable from 34.5°C to 37.5°C in 0.1°C steps.
2.2.2 DESCRIPTION OF POWER CONTROL
POWER COMPENSATION
The actual mains power delivered to the element is not equal to the
power displayed on the front panel of the controller, as the device is
continually monitoring the mains voltage level and compensating for
any slumps and surges that may occur.
In all power delivery modes the amount of mains power delivered to
the element is calculated as shown below.
PDelivered PDisplayed
PCeiling V27.5%
100 V 2
Where:
PDisplayed
PCeiling
is the displayed power level (Power Display).
is the power ceiling (currently 100% for all models).
V7.5% is the nominal line voltage less 7.5% (e.g. 213V for 230V
device).
V is the current line voltage.
PDelivered
is the actual amount of mains power delivered to the
element. Actual power delivered should be constant for constant
power displayed.
RESOLUTION AND DUTY CYCLE
Power to the element is controlled with a triac and switched only on
mains zero crossings to maximise electromagnetic compatibility.
When in Baby Mode, the power is controlled to a resolution of 1%.
Power is delivered in an optimally smooth pattern of mains pulses
which repeats every 2 seconds at 50 Hz (1.7 seconds at 60 Hz).
This even power control helps to reduce ripple in the baby’s skin
temperature. The power level is automatically adjusted ten times
every second.
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2.3
CONTROL PANEL
2.3.1 ALL INFANT WARMER MODELS
LIGHT INDICATOR AND BUTTON
The Light Button toggles the examination light off and on. The Light
Indicator is lit when the light is on and extinguished when the light is
off. If the light fails during use a short tone will sound and the light
indicator will extinguish. If the light is turned on with a faulty bulb,
the indicator will turn on, there will be a short tone and the indicator
will extinguish.
PREWARM INDICATOR AND BUTTON
The Prewarm Button begins Prewarm Mode. The Prewarm Indicator
will be lit if the button is pushed.
MANUAL INDICATOR AND BUTTON
The Manual Button begins Manual Mode. The Manual Indicator will
be lit if the button is pushed.
APGAR INDICATOR AND BUTTON
The Apgar Button starts an Apgar timer with Apgar tones at 1 min, 3
min (optional), 5 min, and 10 min. The indicator lights while the
Apgar timer is active to help distinguish it from a count down timer.
The Apgar timer will blank at 60 minutes. Re-pressing the button will
clear the timer.
TIMER DISPLAY
Displays the current time of the Apgar timer, timer 1 and timer 2
when they are active. Also used by Information Mode.
BABY SKIN TEMPERATURE DISPLAY
Displays the current baby skin temperature when a skin sensor is
inserted in Manual Mode or Baby Mode. Displays 'HI' if the
temperature exceeds 50°C. Displays '---' in the event of a sensor
disconnect alarm. Blanks when in Prewarm Mode or when no skin
sensor is inserted in manual mode.
POWER DISPLAY
Displays the current output power level in the range 0% to 100% in
5% steps.
CONTROL KNOB
Adjusts set temperature in Baby Mode and set power level in Manual
Mode. Adjusts preset start times when either the Timer 1 Button or
the Timer 2 Button is held down (IW910, IW93x & IW980 only). Also
used in Information Mode (see Section 2.5).
2.3.2 IW910, IW93X, AND IW980 SERVO CONTROL MODELS
BABY INDICATOR AND BUTTON
The Baby Button begins Baby Mode. The Baby Indicator will be lit if
the button is pushed.
TIMER1 BUTTON
Starts Timer 1 at the preset start time. Holding the button down
allows the Timer 1 preset start time to be adjusted with the control
knob. Re-pressing the button will clear the timer.
TIMER2 BUTTON
Starts Timer 2 at the preset start time. Holding the button down
allows the Timer 2 preset start time to be adjusted with the control
knob. Re-pressing the button will clear the timer.
AUDIO PAUSE
Inactive unless one of the following alarms is active: Sensor
Disconnect alarm, High Temperature alarm, Low Temperature alarm
and Check Baby alarm. In each case pressing the Audio Pause
Button silences the audible alarm (for 10 minutes) and in the case of
the Check Baby alarm it cancels the visual alarm as well (for another
15 minutes).
SET TEMPERATURE DISPLAY
Displays the current set temperature when in Baby Mode. Blanks in
Prewarm Mode or Manual Mode. Also used by Information Mode.
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2.4
ALARMS
2.4.1 IW910, IW93X AND IW980 SERVO CONTROL MODELS
CHECK BABY ALARM
In Baby Mode this alarm means the output power has been at 100%
for at least 15 minutes indicating that the baby is slow rising to the
set temperature and should be checked. In Manual Mode this alarm
means the output power has been above 25% for at least 15
minutes indicating that the baby should be checked.
HIGH SKIN TEMP. ALARM
In Baby Mode this alarm means the baby skin temperature exceeds
the set temperature by at least 1.0°C. In Prewarm Mode or Manual
Mode this alarm means the baby skin temperature exceeds 39°C.
LOW SKIN TEMP. ALARM
In Baby Mode this alarm means the set temperature exceeds the
baby skin temperature by at least 1.0°C. This alarm is not active in
Prewarm Mode and Manual Mode. This alarm is disabled for 15
minutes each time baby mode is started and re-enabled each time
the skin temperature gets within 0.5°C of set temperature.
SENSOR DISCONNECT ALARM
In Baby Mode this alarm means a problem has been detected with
the skin temperature sensor. This may mean: (a) If '---' is flashing on
the Baby Skin Temperature Display the sensor plug is not inserted
fully into the socket, and/or (b) that one of the thermistor beads
within the DuoSense™ skin sensor does not agree with the other so
that the sensor can no longer be considered accurate. A bead
mismatch alarm occurs within 25 seconds of the sensor being
plugged in. Both meanings apply in Baby Mode, meaning (b) only
applies in Manual Mode and neither apply in Prewarm Mode.
2.4.2 IW920, IW95X AND IW990 MANUAL CONTROL MODELS
This alarm has three meanings:
CHECK BABY ALARM
(a) Manual Mode 15 Minutes
The infant warmer has been running in Manual Mode at over 25%
power for more than 15 minutes. The baby should be checked.
(b) Skin Temperature > 39°C
This alarm is accompanied by a flashing Baby Skin Temperature
Display (which is > 39°C). The baby should be checked.
(c) Skin Sensor Faulty
The DuoSense™ skin sensor feature of the infant warmer has
detected a fault with the skin sensor. This alarm is accompanied by
a flashing Baby Skin Temperature Display. Ensure that the skin
sensor is fully plugged in. If skin sensor is faulty then discard it.
2.4.3 ALL MODELS
SEE MANUAL ALARM
If the LED is flashing then the software has detected a hazard, has
shut down the heater and entered this alarm state. If the warmer is
able to power up again an error code corresponding to the meaning
of the alarm can be obtained with use of the Information Mode (the
error code is preserved in non-volatile memory).
If the LED is on constantly and is accompanied by a rapidly pulsing
two-tone alarm then the hardware watchdog circuit has detected a
micro-controller failure.
If the LED is on constantly and is accompanied by a constant tone
then the overheat protector in the heater has tripped.
POWER FAIL ALARM
When this alarm is flashing the power to the warmer has failed.
NOTE: that this may mean the power switch (located on the front
panel) is on while the power at the supply wall outlet is
switched off.
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2.5 INFORMATION MODE
Information Mode allows additional information about the warmer to be obtained by the front panel
controls and displays. Information mode is intended for use by technical personnel only and should not
be used while the warmer is in use. Information mode is used for calibration and diagnostics.
ENTERING INFORMATION MODE
Depress one of the power mode buttons (Prewarm, Manual or Baby)
and hold it down. Rotate the control knob in any direction for two
complete revolutions. Continue rotating the control knob slowly in the
same direction, the mode indicator light will extinguish at one point. If
this point is passed the indicator will come back on, rotate the knob
back until the point where the indicator is extinguished is reached.
Then release the button.
NOTE: If the option is enabled which requires the Baby Button to be
held down to change Set Temperature then the Baby Button
can not be used to enter information mode.
EXITING INFORMATION MODE
Press one of the power mode buttons (Prewarm, Manual or Baby).
USE OF INFORMATION MODE
The Set Temperature Display shows the Engineering Information
Number (EIN) which indicates what information is being displayed.
The control knob adjusts the EIN. The Timer Display shows the
selected item of information.
AVAILABLE INFORMATION
EIN
Meaning of the Timer Display
0 Device configuration (see below for a list of configurations).
1 ROM software version x100 (e.g. 0230 is version 2.30).
2 Present power level (%) in 1% steps.
3 Patient temperature x100 (e.g. 3670 is 36.70°C).
NOTE: 0401 is displayed when the skin sensor is disconnected.
4 Over Temperature reference calibration x100 (e.g. 3950 is
39.50°C).
5 Line voltage as a % of the unit’s nominal voltage.
6 Factory settings (see below for a list of settings)
7 Error code for last flashing See Manual alarm (see section 2.6 for a
list of the possible error codes).
CONFIGURATION NUMBERS
EIN #0 shows the device configuration. The possible configurations
are:
Num. Model
0 Used for manufacture only.
1 IW910, IW93x or IW980 Baby Control Infant Warmers.
2 IW920, IW95x or IW990 Manual Control Infant Warmers.
FACTORY SETTINGS
EIN #6 shows preset values set during manufacture, using one digit of
the Timer Display per option (1 means enabled and 0 means disabled).
The four digits A, B, C and D, from left to right, have the following
meanings:
Digit
Meaning
A Must hold down the Baby Button to change Set Temperature.
B Full volume alarms.
C 3 minute Apgar tone.
D 15 minute Manual Mode alarm.
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2.6 ERROR CODES
EIN #7 shows the error code corresponding to the last See Manual alarm. This value is kept in nonvolatile memory and is updated every time a new error code occurs.
NOTE: Error codes are retained indefinitely and may only change when a new error occurs.
NOTE: Board level replacement of components must be done by qualified service personnel. A service
manual and schematic diagram is required.
See section 2.5 for access to Information Mode.
The possible error codes are:
Code
0
1-2
5
Name
NONE
TEMPERATURE
MUX
BEADS
SHORTED
Meaning
No error has occurred.
Temperature multiplexer is not
responding correctly. Temperature
cannot be measured.
The two thermistor beads in the
DuoSense™ skin sensor are
detected to have shorted together.
The skin sensor should be checked.
Using igure 11.1.2, check that
contact A is not shorted to contact
B. If the skin sensor is operating
correctly, then there may be a short
circuit within the unit itself.
Action
Re-start unit.
Replace Control PCB if error persists.
TM
Check DuoSense skin sensor is
operating correctly.
If skin sensor is operating correctly,
open front control panel and check
patient probe harness and connection
socket for any short circuit. Check for
faulty connections. Repair or replace as
required.
If error persists, replace Control PCB.
7
STACK
OVERFLOW
The microprocessor stack has
overflowed indicating
microprocessor or memory failure.
Re-start unit.
Check tact switches on Control PCB for
proper operation.
11
BUTTON MUX
Button multiplexer is not responding
correctly. Buttons cannot be
sensed.
13
BAD
FREQUENCY
Bad Frequency (the device could
not sense the frequency of the
mains power supply at power up).
One of the regular series of ADC
conversions failed to complete in
the normal time. This suggests that
the internal hardware on the
microcontroller has failed and the
temperature readings along with
other readings can no longer be
relied on.
Bad LED Toggle (the display driver,
U1, which drives the LEDs and
displays and scans the buttons was
detected to be faulty).
Serial Buffer Overflow (the RS232
output serial communications buffer
was detected to have overflowed).
Missing Triac Firing (the triac which
controls power to the element was
sensed as delivering
insufficient/uncontrolled power to
the element).
14
15
16
17
FAILED ADC
LED TOGGLE
BUFFER
OVERFLOW
MISSING
PULSES
NOTE: This error may mean that
one of the backup hardware circuits
has independently detected a fault
IW900 Series Service Manual
Manufactured From December 2014
If error persists, replace Control PCB.
If error persists, replace Control PCB.
Change mains wall power outlet.
If error persists, replace Power PCB.
Re-start unit.
If error persists, replace Control PCB.
Re-start unit.
If error persists, replace Control PCB
and/or Power PCB.
Re-start unit.
If error persists, replace Control PCB.
Check mains outlet for proper voltage.
Check if heater element is open circuit.
Check heater element connectors for
presence of carbon build up, fusing or
burn marks. Replace if burnt or
damaged.
Check head thermostat. Reset if
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Code
18
19
2028
Name
SPURIOUS
PULSES
RELAY OUT
EEPROM
ERROR
30
NOT
CONFIGURED
31
STUCK
BUTTON
Meaning
and disconnected power from the
element.
Action
necessary.
Spurious Triac Firing (the triac
which controls power to the element
was sensed as delivering
additional/uncontrolled power to the
element).
Relay Out (the relay which isolates
the element in the event of
continuous full power to the element
or hardware watchdog failure is
detected to have opened).
Change mains wall power outlet.
Non-volatile memory error (a
problem was detected with the nonvolatile memory - most of these
errors can be recovered from by
switching the device off then on
again).
A device configuration is not selected.
The device is configured during
manufacture and cannot run if a
particular model variant has not
been set.
One of the buttons is stuck down.
This can be caused by holding one
of the buttons down while the
device is turned on.
Re-start unit.
Replace Power PCB if still faulty.
Replace Triac component.
Replace Power PCB if error persists.
Check closing of relays when switching
‘ON’ the device. Replace Power PCB if
necessary.
If symptom persists, replace Control
PCB, microcontroller or watchdog circuit
have gone faulty.
Replace Control PCB if error persists.
Replace Control PCB.
Turn mains power switch off. Turn
warmer on again, without touching
control panel.
If error code is still present, individually
press each button on front panel and
check that it makes a clicking sound. If
it is okay and error still persists open
front control panel.
Remove Control PCB. Visually check
each switch for being stuck or measure
continuity with an ohmmeter (the meter
should indicate an infinite value).
Replace faulty tact switch as required.
Replace Control PCB if still faulty.
34
35
36
LIGHT CIRCUIT
FAULTY
TEMPERATURE
PROBLEM
NOT
CONFIGURED
The light has been detected as
turned on when it should be turned
off. There is either a fault in the
light control circuitry or the light
sense circuitry.
Measurement from the temperature
references are so far out of
tolerance that auto-calibration of the
skin sensor temperatures is
impossible. It is likely that the
temperature circuit is faulty.
Device configuration in EEPROM
has changed (non userserviceable).
IW900 Series Service Manual
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Replace Power PCB.
Replace Control PCB if error persists
Re-start unit.
Replace Control PCB if error persists.
Replace Control PCB.
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PART 3: SPECIFICATIONS
3.1
IW910 AND IW920 MOBILE INFANT WARMERS
3.1.1 ELECTRICAL SPECIFICATIONS
SUPPLY VOLTAGE AND CURRENT
230 V~
120 V~
SUPPLY FREQUENCY
50/60 Hz
NOMINAL POWER CONSUMPTION
510 W
510 W
HEATER POWER
450 W
2.2 A~ maximum
4.2 A~ maximum
230 V~ model
120 V~ model
Mattress irradiance is 32 mW/cm² at 100% heater power and 68 cm (26.8”) heater grill
to mattress distance
20 W
LIGHT POWER
Maximum intensity is 400 lux at 68cm (26.8”) heater grill to mattress distance
TEMPERATURE RANGE
Set temperature from 34.5°C to 37.5°C in 0.1°C steps
TEMPERATURE MEASUREMENT
Displayed range of 4.0°C to 50.0°C in 0.1°C steps
Sensor accuracy of ± 0.1°C
TEMPERATURE SENSOR
Twin YSI 400 compatible thermistors with 100 M insulation at 500V
between all electrical contacts and the skin surface
3.1.2 MECHANICAL SPECIFICATIONS
Adjustable from 151 cm to 191 cm (59.4" to 75.2")
HEIGHT
To suit bassinets from 71 cm to 111 cm (28" to 43.7")
WIDTH
65 cm (25.6”)
DEPTH
110 cm (43.3”)
WEIGHT WITHOUT ACCESSORIES
22 kg (48.5 lb)
MAXIMUM LOADING
4 kg (8.8lb) of Accessories, 26 kg (57.3 lb) total weight
HEATER HEAD ROTATION
-130º to +130º from centre position
CASTORS
5 x Ø 50 mm (2”), all locking
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3.2
IW93X AND IW95X COSYCOT™ INFANT WARMERS
3.2.1 ELECTRICAL SPECIFICATIONS
SUPPLY VOLTAGE AND CURRENT
Voltage
230 V~
120 V~
Controller only
2.2 A~ maximum
4.2 A~ maximum
SUPPLY FREQUENCY
50/60 Hz
POWER CONSUMPTION
970 W
744 W
510 W
Including Accessories
4.2 A~ maximum
6.2 A~ maximum
230 V~ model Including accessories (max)
120 V~ model
Controller and heater only
HEATER POWER
450 W - Mattress irradiance is 32 mW/cm² at 100% heater power.
LIGHT POWER
20 W
TEMPERATURE RANGE
Set temperature from 34.5°C to 37.5°C in 0.1°C steps
TEMPERATURE MEASUREMENT
Displayed range of 4.0°C to 50.0°C in 0.1°C steps
Sensor accuracy of ± 0.1°C
TEMPERATURE SENSOR
Twin YSI 400 compatible thermistors with 100 M insulation at 500V
between all electrical contacts and the skin surface
- Maximum intensity is 400 lux.
3.2.2 MECHANICAL SPECIFICATIONS
ELECTRIC ELEVATOR MODULE
HEIGHT
WIDTH
DEPTH
STANDARD FIXED HEIGHT OPTION
Adjustable from 170 to 186 cm
(67” – 73”)
77 cm (30”)
110 cm to 129 cm (43” – 51”) - Depends on
172 cm (68”)
accessories fitted, bassinet size and bassinet height
bassinet size
WEIGHT WITHOUT
ACCESSORIES
MAXIMUM
LOADING
103 or 108 cm (41” or 43”) - depends on
67 kg (147 lb)
55 kg (121 lb)
73 kg (160 lb) of
accessories -
85 kg (187 lb) of accessories - Includes
patient
Includes patient
140 kg (308 lb) total weight
MATTRESS
HEIGHT
HEATER GRILL TO
MATTRESS
HEATER HEAD
ROTATION
BASSINET SIZE
(STANDARD)
BASSINET SIZE
(LONG)
BASSINET SIDE
PANEL HEIGHT
BASSINET
TILTING
POSITIONS
CASTORS
140 kg (308 lb) total
weight
88 to 104 cm (35” – 41”)
91 cm (36”)
68 cm (27”)
-130º to +130º from centre position
65 x 65 cm (26” x 26’) Standard Mattress size 62 cm x 62 cm (24” x 24”)
65 x 75cm (26” x 30”) Long mattress size 62cm x 72cm (24” x 28”)
17 cm (14 cm front & rear) – Measured from the bassinet
26 cm (23 cm front & rear) – With high side option
-10° to +10° in ½° increments
4 x Ø10 cm (4”)
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3.3
IW980 AND IW990 WALL MOUNT INFANT WARMERS
3.3.1 ELECTRICAL SPECIFICATIONS
SUPPLY VOLTAGE AND CURRENT
230 V~
120 V~
SUPPLY FREQUENCY
50/60 Hz
NOMINAL POWER CONSUMPTION
510 W
510 W
HEATER POWER
450 W
2.2 A~ maximum
4.2 A~ maximum
230 V~ model
120 V~ model
Mattress irradiance is 32 mW/cm² at 100% heater power and 68 cm (26.8”) heater grill
to mattress distance
20 W
LIGHT POWER
Maximum intensity is 400 lux at 68cm (26.8”) heater grill to mattress distance
TEMPERATURE RANGE
Set temperature from 34.5°C to 37.5°C in 0.1°C steps
TEMPERATURE MEASUREMENT
Displayed range of 4.0°C to 50.0°C in 0.1°C steps
Sensor accuracy of ± 0.1°C
TEMPERATURE SENSOR
Twin YSI 400 compatible thermistors with 100 M insulation at 500V
between all electrical contacts and the skin surface
3.3.2 MECHANICAL SPECIFICATIONS
HEIGHT
36 cm (14.2”)
WIDTH
20 cm (7.9”)
DEPTH
76 cm (29.9”)
WEIGHT WITHOUT ACCESSORIES
7.4 kg (16.3 lb)
HEATER HEAD ROTATION
-130º to +130º from centre position
Depends on installation
3.3.3 INSTALLATION INSTRUCTIONS
1. Ensure the surface that the bracket is to be mounted on is
vertically level and rigid; e.g. concrete wall, timber stud, steel
girder/beam etc.
NOTE: Under no circumstances should the wall bracket be
attached directly to plasterboard, drywall, or other non loadbearing materials without sufficient internal wall reinforcement.
043041135
WALL MOUNT BRACKET
Mount the bottom edge of the wall bracket 56 cm (22”) above the
top surface of the bassinet mattress. This will achieve the
recommended nominal height for the bottom of the head of 68 cm
(26¾”) above the mattress.
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2. Affix the wall bracket (1) onto the wall using suitable fasteners (2)
for the surface (e.g. for concrete use masonry anchor bolts, for
timber use 75 mm wood screws). Use all six fastening holes.
These are 6 mm (1/4”) dia. with 14 mm (9/16”) dia. clearance
holes.
NOTE: When securely fastened, the fasteners must withstand a
direct pull-out force of 370 N (83 pounds) per fastener. In addition,
all fasteners must withstand a downwards shear force of 200 N
(45 pounds) per fastener. The wall must be constructed to
withstand a bending moment of 150 Nm (111 foot-pounds) which
is applied to the wall bracket.
3.4
3.5
ENVIRONMENTAL SPECIFICATIONS
OPERATING
TRANSPORT
STORAGE
TEMPERATURE
18°C to 30°C
-10°C to 50°C
-10°C to 50°C
HUMIDITY
0% to 90%RH
0% to 90%RH
0% to 90%RH
EQUIPMENT CLASSIFICATIONS
Class I Medical Electrical Equipment
Type B Applied Part (Bassinet)
Type BF applied part (Temperature Sensor)
Continuous operation
IP Classification: IPX0
Not suitable for use in the presence of flammable anaesthetics
3.6
STANDARDS AND APPROVALS
Designed to conform to the requirements of:
EN / IEC 60601-1
EN / IEC 60601-1-2
EN / IEC 60601-2-21
AS/NZS 3200.1.0
For European Union only:
MDD Class IIb
3.7
MATERIALS STATEMENT
3.7.1 DEHP
The IW900 series warmer and accessories do not contain patient contacting PVC devices plasticized
with DEHP.
The IW900 series warmer and accessories do not contain latex.
3.7.2 California residents please be advised of the following, pursuant to Proposition 65:
WARNING: This product contains chemicals known to the State of California to cause cancer, birth
defects and other reproductive harm.
For more information, please visit: www.fphcare.com/prop65
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3.8
EMC
The IW900 Series Infant Warmer needs special precautions regarding EMC and needs to be installed
and put into service according to the EMC information in Section 3.8.2 EMC Declaration.
Portable and mobile RF communication equipment can affect IW900 series Infant Warmer
Temperature sensors and temperature sensor adaptor listed below are compliant with the requirements
of Emission and Immunity. The use of accessories, transducers, cables, temperature sensors and
temperature sensor adaptors other than those listed below may result in increased emissions or
decreased immunity of the IW900 series Infant Warmer.
Temperature sensors: 900IW001, NC02X
Temperature sensor adaptor: 900IW003
The IW900 series Infant Warmer should not be used adjacent to or stacked with other equipment and if
adjacent or stacked use is necessary the IW900 series Infant Warmer should be observed to verify
normal operation in the configuration in which it will be used.
3.8.1 ESSENTIAL PERFORMANCE
The Essential Performance of the IW900 Series Infant Radiant Warmer is defined as providing
controlled infra-red output and display of temperature within stated limits of accuracy, or entering an
alarm state if this is not possible.
3.8.2 EMC DECLARATION
Guidance and manufacturer’s declaration – electromagnetic emissions
The IW900 series warmers are intended for use in the electromagnetic environment specified below. The
customer or the user of an IW900 series warmer should ensure that it is used in such an environment.
Emissions test
Compliance
RF emissions
Group 1
CISPR 11
RF Emissions
Class A
CISPR 11
Harmonic Emissions
Class A
Electromagnetic environment - guidance
The IW900 series warmer uses RF Energy only for
its internal function. Therefore, its RF emissions are
very low and are not likely to cause any interference
in nearby electronic equipment.
The IW900 series warmers are suitable for use in all
establishments other than domestic and those
directly connected to the public low voltage power
supply network that supplies buildings used for
domestic purposes.
IEC 61000-3-2
Voltage fluctuations/ flicker
emissions
Complies
IEC 61000-3-3
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Guidance and manufacturer’s declaration – electromagnetic immunity
The IW900 series warmers are intended for use in the electromagnetic environment specified below. The
customer or the user of an IW900 series warmer should ensure that it is used in such an environment.
IEC 60601
test level
Compliance level
± 6 kV contact
± 6 kV contact
± 8 kV air
± 8 kV air
Electrical fast
transient/burst
± 2 kV for power
supply lines
± 2 kV for power
supply lines
IEC 61000-4-4
± 1 kV for
input/output lines
± 1 kV for
input/output lines
Surge
± 1 kV line(s) to
line(s)
± 1 kV differential
mode
± 2 kV line(s) to
earth
± 2 kV common
mode
IMMUNITY test
Electrostatic discharge
(ESD)
IEC 61000-4-2
IEC 61000-4-5
Voltage dips, short
interruptions and
voltage variations on
power supply input lines
IEC 61000-4-11
<5 % UT
<5 % UT
(>95 % dip in UT) for (>95 % dip in UT)
0,5 cycle
for 0,5 cycle
40 % UT
40 % UT
(>60 % dip in UT) for (>60 % dip in UT)
5 cycles
for 5 cycles
<70 % UT
<70 % UT
(>30 % dip in UT) for (>30 % dip in UT)
25 cycles
for 25 cycles
Electromagnetic environment guidance
Floors should be wood, concrete or
ceramic tile. If floors are covered with
synthetic material, the relative humidity
should be at least 30%.
Mains power quality should be at least
that of typical commercial or hospital
environment.
Mains power quality should be that of a
typical commercial or hospital
environment.
Mains power quality should be that of a
typical commercial or hospital
environment. If the user of the IW900
series warmer requires continued
operation during power mains
interruptions, it is recommended that the
IW900 series warmer be powered from
an uninterruptible power supply or a
battery.
<5 % UT
<5 % UT
(>95 % dip in UT) for (>95 % dip in UT)
5s
for 5 s
Power frequency
(50/60 Hz) magnetic
field
3 A/m
3 A/m
Power frequency magnetic fields should
be at levels characteristic of a typical
location in a typical commercial or
hospital environment.
IEC 61000-4-8
Note UT is the a.c. mains voltage prior to application of the test level
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Guidance and manufacturer’s declaration – electromagnetic immunity
The IW900 series warmers are intended for use in the electromagnetic environment specified below. The
customer or the user of an IW900 series warmer should ensure that it is used in such an environment.
IMMUNITY test
IEC 60601 test
level
Compliance
level
Electromagnetic environment - guidance
Portable and mobile RF communications equipment
should be used no closer to any part of an IW900
series warmer, including cables, than the
recommended separation distance calculated from the
equation applicable to the frequency of the transmitter.
Recommended separation distance
d 1.2 P
Conducted RF
3 Vrms
3V
IEC 61000-4-6
150kHz to 80 MHz
Radiated RF
3 V/m (230V)
10 V/m (120V)
IEC 61000-4-3
80 MHz to 2,5 GHz
10 V/m
d 0.35 P
80 MHz to 800MHz
d 0.70 P
800 MHz to 2,5 GHz
where P is the maximum output power rating of the
transmitter in watts (W) according to the transmitter
manufacturer and d is the recommended separation
distance in metres (m).
Field strengths from fixed RF transmitters, as
a
determined by an electromagnetic site survey, should
be less than the compliance level in each frequency
b
range.
Interference may occur in the vicinity of equipment
marked with the following symbol:
NOTE 1
At 80 MHz and 800MHz, the higher frequency range applies.
NOTE 2
These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
a
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and
land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot be predicted
theoretically with accuracy. To assess the electromagnetic environment due to fixed RF transmitters, an
electromagnetic site survey should be considered. If the measured field strength in the location in which
an IW900 series warmer is used exceeds the applicable RF compliance level above, the IW900 series
warmer should be observed to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as re-orienting or relocating the IW900 series warmer.
b
Over the frequency range 150 kHz to 80MHz, field strengths should be less that 3V/m.
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Recommended separation distances between portable and mobile RF
communications equipment and IW900 series warmers
The IW900 series warmers are intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the IW900 series warmers can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and an IW900 series warmer as recommended below, according to
the maximum output power of the communications equipment.
Separation distance according to frequency of transmitter
m
Rated maximum output power
of transmitter
150 kHz to 80 MHz
80 MHz to 800 MHz
800 MHz to 2,5 GHz
W
d 1.2 P
d 0.35 P
d 0.70 P
0,01
0.12
0.035
0.07
0,1
0.38
0.11
0.22
1
1.2
0.35
0.70
10
3.8
1.1
2.2
100
12
3.5
7.0
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in
metres (m) can be estimated using the equation applicable to the frequency of the transmitter, where P is the
maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer.
NOTE 1
At 80 MHz and 800MHz, the higher frequency range applies.
NOTE 2
These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
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3.9
WARMER IDENTIFICATION
Infant Warmer serial numbers can be found on the back of the column immediately behind the control
panel. The section of label pictured is typical of the information contained on a warmer label.
REF
IW910AEU
h
Servo Mobile Infant Warmer
LOT
SN
230V~50/60Hz
2.2A
Heater 450W
Light 20W
MADE IN
New Zealand
140901
140901123456
2001-0
2014-09
(01) 0 94 200124 0971 3 (21) 140901123456
REF - This details the model number and code which identifies voltage, language and distributor
specifics (see table below)
LOT - The production date: (14) = 2014, (09) = September, (01) = First day
NOTE: This is not specific to a particular warmer
SN The serial number is specific to a particular warmer. The first six digits match the LOT number
and the last six digits identify the specific product serial number.
The bar code consists of the following predefined application identifiers:
01
0
94
200124
0971
3
- Not used
- Sequence start
- Country of Manufacture - New Zealand
- Company Identifier - Fisher & Paykel Healthcare
- Product Code
- Check Sum
REF – the model and code is made up as:
Model
1
Voltage
IW910
A 230V
IW920
J
120V
IW93x
IW95x
IW980
IW990
2
E
Language
English
Spanish
French
F
French
Dutch
Italian
Spanish
Portuguese
English
G
German
Swedish
Norwegian
English
Z
Chinese
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3
A
K
U
S
Distributor Option
Aust / NZ plug
UK power plug
Universal (no plug)
Swivel Head
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PART 4: MAINTENANCE AND SERVICING
WARNING
4.1
All maintenance should be undertaken by qualified service personnel.
MAINTENANCE SCHEDULE
Fisher & Paykel Healthcare recommend that the following Safety, Performance and Functional checks
be performed at least annually for all models covered by this manual. It is important to follow hospital
and local regulations if more frequent checks are stipulated.
NOTE: A maintenance check sheet is provided in 4.5.
4.1.1
EQUIPMENT
Depending on the extent of the service check and the accessories included on your warmer the
following equipment may be required.
Safety Analyser:
Thermometer:
Pressure Gauge:
Pressure Gauge:
Flowmeter:
Suction gauge:
Calibrated Voltmeter
IEC60601-1 or IEC62353, to class BF
30 – 40C
0.1C
0 – 100psi
5% fsd
0 – 100cm H20
2% fsd
0 – 15 L/min
5% fsd
0 – 200 mm Hg
2.5% fsd
NOTE: For neoBLUE® mini phototherapy refer to 185043921 service manual.
NOTE: For neoweigh™ in-bed scales refer to 185045090 service manual.
NOTE: For Neopuff™ Infant Resuscitator refer to 185041597 service manual.
4.2
SAFETY CHECK
WARNING
Connect the power cord only to a properly grounded wall receptacle that is approved for
hospital use and of the correct voltage. DO NOT use extension cords or an AC receptacle
box for this device.
The unit should be tested to the current medical electrical standards for in-house testing
for each specific country (example, refer to UL60601-1 for USA, EN60601-1 or IEC62353 for
Europe, AS/NZS 3200.1.0 for Australia and New Zealand). This should be done prior to
initial use and at least annually thereafter.
NOTE: To conduct an earth test, the test lead should be attached to a bolt located under a plastic cap at the top
of the column – refer diagram 7.2.2 component 5.
NOTE: The Transport Handle of the CosyCot™ bassinet is not earthed but is protected in accordance with
subclause 3.132 of IEC60601-1:2005. To verify safety, conduct a Patient Leakage Current test under
normal operating conditions. The pass criterion is less than 0.1 mA AC.
NOTE: The parts shown in this technical manual are not all available for purchase as spare parts.
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4.3
SYSTEM CHECK
This procedure is the recommended performance check for Fisher & Paykel Healthcare Radiant
Warmers. A check of calibration is included.
ALARMS CHECK
1. Switch the Power Switch on. Check that the increasing pitch start up sound
occurs and that the following alarm indicators, depending on the model,
flash momentarily: Check Baby, High Temperature, Low Temperature, and
Sensor Disconnect depending on model.
POWERFAIL CHECK
2. Test procedure for power fail alarm:
Turn ‘ON’ and power Warmer for at least 5 minutes to ensure full charging of
the supercapacitor.
Turn ‘O
’ warmer and unplug power cord from wall supply socket.
Turn the Warmer front panel power switch ‘ON’. Check that the Power-Fail
Indicator flashes and audible alarm sounds for at least 12 minutes.
The additional 2 minutes is to allow for variation amongst capacitors and
differing operating conditions that may occur amongst warmers.
If the Power-Fail alarm operates for less than 12 minutes, the Power-Fail
supercapacitor will need to be replaced as it may have insufficient charging
ability to provide an alarm time of at least 10 minutes by the time of the next
annual check.
Replacement supercapacitors may be ordered through your Fisher & Paykel
Healthcare representative using the following part number:
Part # 311040682 (Cap Super 1F 5.5V HT)
Alternatively, you may order a replacement Power PCB:
120V, Part # 043041004 PCB Assy Power IW900 120V
230V, Part # 043041003 PCB Assy Power IW900 230V
STUCK BUTTON
3. Press and hold Prewarm/Standby Button. Reconnect the power cord to the
wall supply. Check that the warmer starts correctly and that the See Manual
indicator flashes and audible alarm sounds. Release the Prewarm/Standby
Button.
NOTE: This check causes a Stuck Button error to occur which will be logged as
the last error that occurred as accessible via Information Mode.
4. Switch the Power Switch off then on again. Check that the warmer starts up
normally.
CALIBRATION CHECK
5. Enter Information Mode (refer section 2.5) and select EIN #5.
6. Ensure that the light is off. Measure the mains voltage at the wall outlet
supplying the warmer, using a calibrated voltmeter.
7. Calculate and record the measured voltage as a percentage of the device’s
nominal supply voltage which will be 120V or 230V.
8. Check that the top display reads the calculated percentage (± 5%).
9. Select EIN #4.
10. Check that the top display reads 3950 ± 20 (39.50 ± 0.2°C).
Information Mode.
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