Propaq LT Vital Signs Monitor Service Manual Sw Ver 1.5X

ii

Welch Allyn Propaq LT Vital Signs Monitor

© 2011 Welch Allyn. All rights are reserved. To support the intended use of the product described in this publication, the purchaser of the product is permitted to copy this publication, for internal distribution only, from the media provided by Welch Allyn. No other use, reproduction, or distribution of this publication, or any part of it, is permitted without written permission from Welch Allyn Welch Allyn assumes no responsibility for any injury to anyone, or for any illegal or improper use of the product, that may result from failure to use this product in accordance with the instructions, cautions, warnings, or statement of intended use published in this manual. Welch Allyn, Propaq, Acuity, FlexNet, Smartcuf, and Flexible Monitoring are registered trademarks of Welch Allyn. ParamSet is a trademark of Welch Allyn. Masimo, SET, and LNCS are registered trademarks, and FastSAT and APOD are trademarks, of Masimo Corporation. Possession or purchase of a Masimo SpO2-equipped monitor does not convey any express or implied license to use the device with unauthorized sensors or cables which would, alone or in combination with this device, fall within the scope of one or more of the patents relating to this device. Nellcor and Oximax are registered trademarks of Nellcor Puritan Bennett. Software in this product is Copyright Welch Allyn or its vendors. All rights are reserved. The software is protected by United States of America copyright laws and international treaty provisions applicable worldwide. Under such laws, the licensee is entitled to use the copy of the software incorporated with this instrument as intended in the operation of the product in which it is embedded. The software may not be copied, decompiled, reverse-engineered, disassembled or otherwise reduced to human-perceivable form. This is not a sale of the software or any copy of the software; all right, title and ownership of the software remain with Welch Allyn or its vendors. For information about any Welch Allyn product, call the nearest Welch Allyn representative: USA + 1 315 685 4560 800 535 6663 Canada 800 561 8797 European Call Center + 35 3 46 906 7790

Australia + 61 2 9638 3000 800 074 793 China + 86 216 327 9631 France + 33 1 60 09 33 66

Germany + 49 7477 92 71 86

Japan + 81 3 3219 0071

Latin America + 1 305 669 9003

Netherlands + 31 15 750 5000

Singapore + 65 6419 8100

South Africa + 27 11 777 7555

United Kingdom + 44 20 7365 6780

Sweden + 46 8 58 53 65 51

This device complies with Part 15 of the FCC rules and with the rules of the Canadian ICES-003. Operation is subject to the following two conditions: (1) This device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation. Caution! Changes or modifications not expressly approved by Welch Allyn could void the purchaser’s authority to operate the equipment. REF 810-2712-XX DIR 810-2713-01 A

Welch Allyn, Inc. 8500 SW Creekside Place Beaverton, OR 97008-7107 USA

www.welchallyn.com Printed in USA

Regulatory Affairs Representative Welch Allyn Limited Navan Business Park Dublin Road, Navan County Meath, Republic of Ireland

iii

Contents 1 - Safety summary... 1 Warnings... 1 General safety considerations... 1 Electrostatic discharge (ESD)... 2 Symbols... 2

2 - Overview... 3 Purpose and scope... 3 Technical support services... 3 Returning products... 4 Product configurations... 4 Recommended service intervals... 5 Service options... 5 Related documents... 6 Controls... 6 Service menu... 6

3 - Troubleshooting and repair... 9 Troubleshooting chart... 9 Battery use and care... 16 Service chart... 17 Service menus for repair and network troubleshooting... 19

4 - Disassembly and reassembly... 23 Procedures overview... 23 Procedures... 27

5 - Functional verification... 53 Functional verification overview... 53 Equipment required... 53 Procedures... 54 Checklist and test results report form... 65

6 - Replacement parts... 69 A - 35-ml test volume... 71 Index... 73

1

1 Safety summary All users of the monitor must read this safety summary and all warning and caution statements in the manual.

Warnings WARNING Place the monitor and accessories in locations where they cannot harm the patient should they fall from a shelf or mount. WARNING Do not connect more than one patient to a monitor. WARNING Do not connect more than one monitor to a patient. WARNING Do not use the monitor in an MRI suite or hyperbaric chamber. WARNING To avoid explosion, do not operate the monitor in the presence of flammable anesthetics. WARNING Do not use cables with abraded or broken insulation. WARNING Do not use a monitor that has been damaged. If a monitor has been damaged, remove it from service until it has been verified for proper operation by qualified service personnel. WARNING Use only accessories approved by Welch Allyn. Visit www.welchallyn.com. The use of any other accessories can result in inaccurate patient data, can damage the equipment, and can void your product warranty. WARNING Always use accessories according to the standards of your facility and according to the manufacturer's directions. Caution Do not use cables that do not operate properly. Caution Do not autoclave the monitor. Caution Autoclave accessories only if the manufacturer’s instructions direct you to do so. Many accessories can be severely damaged by autoclaving.

2

Safety summary

Welch Allyn Propaq LT Vital Signs Monitor

General safety considerations •

Frequently check all cables, both electrically and visually.

•

If the monitor detects an unrecoverable problem, it displays a brief ‘Fault’ message. See “Alert Messages and Status Messages”, Propaq LT Vital Signs Monitor Directions for Use (810-2713-XX). Report all such errors to Welch Allyn.

•

Do not service a monitor under warranty. Servicing a monitor under warranty voids the warranty. All service on monitors under warranty must be performed by Welch Allyn or at a Welch Allyn authorized service center.

Electrostatic discharge (ESD)

CAUTION

SENSITIVE ELECTRONIC DEVICES DO NOT SHIP OR STORE NEAR STRONG ELECTROSTATIC, ELECTROMAGNETIC, MAGNETIC OR RADIOACTIVE FIELDS.

ATTENTION OBSERVE PRECAUTIONS FOR HANDLING

ELECTROSTATIC SENSITIVE DEVICES

Caution Electrostatic discharge (ESD) can damage or destroy electronic components. Handle static-sensitive components only at static-safe workstation. Caution Assume that all electrical and electronic components of the monitor are static-sensitive. Electrostatic discharge is a sudden current flowing from a charged object to another object or to ground. Electrostatic charges can accumulate on common items such as foam drinking cups, cellophane tape, synthetic clothing, untreated foam packaging material, and untreated plastic bags and work folders, to name only a few. Electronic components and assemblies, if not properly protected against ESD, can be permanently damaged or destroyed when near or in contact with electrostatically charged objects. When you handle components or assemblies that are not in protective bags and you are not sure whether they are static-sensitive, assume that they are static-sensitive and handle them accordingly. •

Perform all service procedures in a static-protected environment. Always use techniques and equipment designed to protect personnel and equipment from electrostatic discharge.

•

Remove static-sensitive components and assemblies from their static-shielding bags only at static-safe workstations-a properly grounded table and grounded floor mat-and only when you are wearing a grounded wrist strap (with a resistor of at least 1 megohm in series) or other grounding device.

•

Use only grounded tools when inserting, adjusting, or removing static-sensitive components and assemblies.

•

Remove or insert static-sensitive components and assemblies only with monitor power turned off.

•

Insert and seal static-sensitive components and assemblies into their original static-shielding bags before removing them from static-protected areas.

•

Always test your ground strap, bench mat, conductive work surface, and ground cord before removing components and assemblies from their protective bags and before beginning any disassembly or assembly procedures.

Service Manual

Safety summary

Symbols WARNING Indicates conditions that could lead to illness, injury, or death.

Caution In this manual, indicates conditions that could damage equipment or other property.

3

4

Safety summary

Welch Allyn Propaq LT Vital Signs Monitor

5

2 Overview Purpose and scope This is a reference for periodic preventive maintenance and corrective service procedures for the Propaq LT monitors, models 802LTAN, 802LT0N, 802LTRN, 802LTAS, 802LT0S, and 802LTRS. Corrective service is supported to the level of field-replaceable units. Field-replaceable units include certain circuit-board assemblies, subassemblies, case parts, and other parts. All field-replaceable parts are listed in “Replacement parts” on page 71. WARNING When performing a service procedure, follow the instructions exactly as presented in this manual. Failure to do so could damage the monitor, invalidate the product warranty, and lead to serious personal injury. Caution No component-level repair of circuit boards and subassemblies is supported. Use only the repair procedures described in this manual. Note

Repair and replacement of the main board is not supported. Any service work on the main board must be performed by certified and qualified service personnel at an authorized Welch Allyn service center. (For contact information, see page ii.) Repair and replacement of the radio and the antenna is not supported. Any service work on the radio and the antenna must be performed by certified and qualified service personnel at an authorized Welch Allyn service center. (For contact information, see page ii.)

This guide provides troubleshooting information, assembly procedures, and instructions for functional testing and performance verification. It is intended for use only by technically qualified service personnel. This guide applies only to the Propaq LT monitor. For service information about any other model of the Propaq monitor, refer to the service manual for that product.

Technical support services Welch Allyn offers the following technical support services: Telephone support (1-800-289-2501 and 1-503-530-7500) Loaner equipment Service agreements Service training Replacement service parts Factory service

6

Overview

Welch Allyn Propaq LT Vital Signs Monitor

For information on any of these services, call one of the numbers listed on page ii.

Returning products To return a product for service, contact Welch Allyn Technical Support and request a Return Material Authorization (RMA) number. Note

Welch Allyn does not accept returned products without an RMA.

When requesting an RMA, please have the following information available: •

Product name, model number, and serial number.

•

Your customer number.

•

A contact name and phone number.

•

A complete return shipping address.

•

Any special shipping instructions.

•

A purchase-order number or credit-card number if the product is not covered by warranty.

•

A full description of the problem or service request.

Note

To ensure safe receipt of your monitor by the service center and to expedite processing and return of the monitor to you, thoroughly clean all residues from the monitor before you ship it to Welch Allyn. United States federal regulations prohibit the processing of any device contaminated with blood-borne pathogens. Welch Allyn thoroughly cleans all returned monitors on receipt, but any monitor that cannot be adequately cleaned cannot be repaired.

Before shipping the monitor, please observe these packing guidelines: •

Remove from the package all hoses, connectors, cables, sensors, power cords, and other ancillary products and equipment, except those items that might be associated with the problem.

•

Put the monitor, enclosed in a plastic bag with a packing list, into the original shipping carton with the original packing materials or into another appropriate shipping carton.

•

Write the Welch Allyn RMA number with the Welch Allyn address on the outside of the shipping carton.

Service Manual

Overview

Product configurations Model numbers for the configurations are as follows: Model

Monitoring Parameters

FlexNet/Acuity Communication Enabled

Top-Level Assembly

Serial # Prefix

802LT0N

ECG, NIBP, Nellcor SpO2

No

007-0160-XX

KA

802LTRN

ECG, NIBP, Nellcor SpO2

Yes 802.11 FHSS

007-0161-XX

KA

802LTAN

ECG, NIBP, Nellcor SpO2

Yes 802.11a

007-0384-XX

KA

802LT0S

ECG, NIBP, Masimo SpO2

No

007-0268-XX

KA

802LTRS

ECG, NIBP, Masimo SpO2

Yes 802.11 FHSS

007-0269-XX

KA

802LTAS

ECG, NIBP, Masimo SpO2

Yes 802.11a

007-0383-XX

KA

Recommended service intervals Interval or condition

Action recommended

Procedure

Every 6 - 24 months (per hospital protocols)

Verify functionality

“Functional verification” on page 55

Every 36 months

Replace the air filter

“Replacing the air filter” on page 30

Every 36 months

Replace the battery

“Removing the lithium ion battery assembly” on page 29

The battery does not hold a charge

Check battery capacity Replace the battery

“Functional verification” on page 55 “Removing the lithium ion battery assembly” on page 29

The monitor has been dropped or otherwise damaged

Verify functionality

“Functional verification” on page 55

The monitor is not functioning properly

Verify functionality

“Functional verification” on page 55

The monitor does not pass the functional verification

Troubleshoot and repair, and then verify functionality

“Troubleshooting and repair” on page 11 “Disassembly and reassembly” on page 25 “Functional verification” on page 55

Return the monitor to an authorized “Returning products” on page 6 Welch Allyn service center

7

8

Overview

Welch Allyn Propaq LT Vital Signs Monitor

Service options Warranty service All repairs on products under warranty must be performed or approved by Welch Allyn. Refer all warranty service to Welch Allyn Factory Service or another authorized Welch Allyn Service Center. Obtain an RMA number for all returns to Welch Allyn Factory Service. (See “Returning products” on page 6.) Caution Unauthorized repairs will void the product warranty.

Non-warranty service Welch Allyn Beaverton Factory Service and authorized Service Centers support nonwarranty repairs. Contact any Welch Allyn regional service center for pricing and service options. Welch Allyn offers modular repair parts for sale to support non-warranty service. This service must be performed only by qualified end-user biomedical/clinical engineers using this service manual.

Service Manual

Overview

9

Related documents Title

Reorder Number

Propaq LT Vital Signs Monitor Directions for Use

810-1828-XX

Controls Monitor Power - Turn the monitor power on or off.

Down - Move the cursor down to the next display item.

Action - Act based on what is highlighted.

Silence/Reset - Silence the current alarm tone for 90 seconds or reset a silenced alarm tone.

Left - Move the cursor left to the next display item; decrease the parameter value.

Display - Cycle to the next configured display format, or cancel the current control, setup, or pop-up menu. Snapshot - Record a 21-second period of numeric and waveform data. Start/Stop NIBP - Start or stop an NIBP measurement.

Right - Move the cursor right to the next display item; increase the parameter value. Up - Move the cursor up to the next display item.

Cradle Monitor Release - Press and hold while removing the monitor from the cradle.

Service menu To access the monitor service menu: From any main display screen (such as Large Numerics, Dual Waveform, ...): 1. Highlight

, HR/PR, SpO2, NIBP, Resp, or

, and then press

2. Highlight Setup (at the bottom of the screen) and press HALL, ROBERT E.

3456187 Adult,

II

. The setup menu appears.

3:00:06P

Rm 239

Setup Menu

1mV/cm

80 HR/min

.

140/78 12 NIBP mmHg (102) Resp/min

97 % SpO2

Setup: Alarms ECG NIBP Timings Configuration Service Suspend Audible Alarms:

Off

On

Alarm Tone

Low

Med

Exit

Trends

Snapshots

(90 sec) High Setup

3. Scroll right ( ) to highlight Service, and press NIBP and Show Info highlighted.

. The service menu appears, with

10

Overview

Welch Allyn Propaq LT Vital Signs Monitor

STEWART, ANN

7762940 Adult

II

3:00:06P

Rm ICU 263

1mV/cm

Service

%

HR/min NIBP mmHg Resp/min SpO2 Setup Alarms ECG NIBP Timings Configuration Service Select (

) to enter service menus

(qualified service personnel only).

Exit

Trends

Snapshots

Setup

7762940

3:00:06P

STEWART, ANN Adult

Rm ICU 263

Service NIBP ECG SpO2 USB Radio Software Display Battery Voltages Buttons NIBP Show Info NIBP Test Characterize Pump

Exit

The service menu contains 10 sections: Section

Operations

Status displays

NIBP

Test NIBP, Characterize Pump

Show Info

ECG

Setup (Enable/Disable HR/PR Alarms)

Parameters

SpO2

(none)

Show Info

USB

(none)

Show Info

Radio

Monitoring (Monitor the radio), Set Netname

Show Info, View and Set Netname

Software

(none)

View Error Log, View RAM Dump, View System Info

Display

Run Pixel Test, Set Bias

View Fonts

Battery

(none)

Show Info

Voltages

(none)

Show Info

Buttons

Test Buttons

(none)

11

3 Troubleshooting and repair Troubleshooting chart...11 Battery use and care...18 Service chart...19 Service menus for repair and network troubleshooting...21

Troubleshooting chart Caution Replace parts, components, or accessories only with parts supplied or approved by Welch Allyn. The use of any other parts can lead to inferior monitor performance and will void the product warranty.

General Refer to “Service chart” on page 19 for information on the suggested corrective actions. Symptom

Possible cause

Possible corrective action

The power-on self-test fails. (Indicator: 2 yellow LED flashes followed by an LED flash of any combination of green, yellow, and red).

Internal RAM failure.

Cycle the power. If the error persists, send the monitor to an authorized Welch Allyn Service Center for service. (See “Returning products” on page 6.)

“Recoverable Fault. Restart monitor.“

An invalid condition has been Restart the monitor. If the fault does not detected that might be resolved reappear, continue to use the monitor. by restarting the monitor.

“System Fault. Service monitor.“

An unrecoverable system error has occurred.

Send the monitor to an authorized Welch Allyn Service Center for service. (See “Returning products” on page 6.)

“System Fault. Service radio.“

Radio fault detected.

Send the monitor to an authorized Welch Allyn Service Center for service. (See “Returning products” on page 6.)

“Battery Fault. Install new battery.“

The battery is not performing to Install a new battery. “Removing the lithium specification. ion battery assembly” on page 29.

Software error. Unexpected reset detected.

Charging has timed out (Charger Remove the monitor from the cradle and state 5). reinsert it, and then attempt again to charge the battery. If the timeout reoccurs, replace the battery. “Removing the lithium ion battery assembly” on page 29. “Equipment Alert. Charger Fault. Service Charger.“

Cradle power board failure.

Insert another monitor and battery pack in the cradle and verify that the symptoms persist. If yes, then replace the cradle power board. “Disassembling the cradle” on page 47.

12

Troubleshooting and repair

Symptom

Welch Allyn Propaq LT Vital Signs Monitor

Possible cause

Possible corrective action

Monitor fails to power up beyond the Button board not connected. initial screen.

Connect the button board to the main board. “Separating the top and bottom chassis halves” on page 31.

Monitor is in the cradle and does not The battery is discharged and power up, and the cradle power the cradle is not powering the indicator is off. monitor.

Verify that AC power is on, that the power adapter is plugged into AC power and into the cradle, and that the monitor is fully seated in the cradle.

Defective power adapter.

Replace the power adapter.

The charger input fuse is blown. Replace the fuse. “Replacing the fuse” on page 47. Monitor is latched in the cradle but does not power up. Power indicator on the cradle is on.

Open the monitor power switch. Replace the bottom chassis (which includes the power switch). “Removing the main board from the bottom chassis assembly” on page 36. Problem with the cradle power board.

Replace the cradle power board. “Disassembling the cradle” on page 47.

Problem with the monitor.

Send the monitor to an authorized Welch Allyn Service Center for service. (See “Returning products” on page 6.)

Monitor battery fails to charge. DC power is applied but the power indicator on the cradle remains off.

Blown power input fuse on the charger I/O panel.

Replace the fuse. “Replacing the fuse” on page 47.

Monitor battery run time duration is less than specified.

The battery is deficient.

Replace the battery. “Removing the lithium ion battery assembly” on page 29.

Radio cannot link up to the Acuity Central Station.

See “Radio” on page 14.

Yellow indicator on the cradle.

Monitor current draw is too high. Service the monitor or the cradle. Cradle circuit breaker is tripped. Charger state 1. Monitor has no battery pack. Charger state 4.

Install the monitor battery pack. “Removing the lithium ion battery assembly” on page 29.

Battery pack temperature is out of range. Charger state 3.

Return the battery pack to within the specified temperature range (0C- 40C).

Battery pack voltage is too low or the battery fuse is blown. Charger state 4.

Replace the battery pack. “Removing the lithium ion battery assembly” on page 29.

Battery pack fails to charge in the specified time. Charger state 5.

Remove the monitor from the cradle and reinsert it, and then attempt again to charge. If the timeout reoccurs, replace the battery pack. “Removing the lithium ion battery assembly” on page 29.

Battery cell(s) over voltage; probably a charge imbalance. Charger state 7.

Replace the battery pack. “Removing the lithium ion battery assembly” on page 29.

Charger board failure.

Examine the cradle internal cabling, the cradle power board, and the interconnect board. “Removing the power/USB flex connector from the bottom chassis” on page 46.

Missing or erroneous LCD characters Faulty LCD.

Replace the LCD. “Disassembling the top chassis” on page 34.

Service Manual

Troubleshooting and repair

13

Symptom

Possible cause

Possible corrective action

Button or buttons inoperative.

Faulty button or buttons.

Replace the top chassis assembly. “Disassembling the top chassis” on page 34.

Voltages displayed on the service menu are out of range.

Main board fault.

Send the monitor to an authorized Welch Allyn Service Center for service. (See page ii.)

Repeated occurrence of “SpO2 Fault. The internal SpO2 connector is No sensor detected.“ loose.

The NIBP air leak exceeds the specification.

“Equipment Alert. NIBP Fault. Air leak. Check hose.“

Secure the internal SpO2 connector. “Removing the main board from the bottom chassis assembly” on page 36.

Faulty SpO2 connector panel.

Replace the connector panel. “Removing the patient connector panel from the bottom chassis” on page 45.

Worn O-ring in the NIBP hose connector.

Try a different NIBP hose or replace the O-ring.

Deficient NIBP check valve, bleed valve, or overpressure valve.

Replace the valve. “Removing the NIBP assembly from the main board” on page 41.

NIBP tubing not properly connected.

Connect the internal tubing. “Removing the NIBP assembly from the main board” on page 41.

If hoses and external fittings are Connect the internal tubing. “Removing the not leaking, internal tubing NIBP assembly from the main board” on might be disconnected. page 41.

Repeated occurrence of “NIBP Fault. Internal tubing is disconnected. Air leak. Check hose.“ Internal tubing is damaged.

Connect the internal tubing. “Removing the NIBP assembly from the main board” on page 41. Replace the damaged section of internal tubing. “Removing the NIBP assembly from the main board” on page 41.

“Equipment Alert. NIBP Fault. Kinked or neonate hose.“

If the correct hose is connected Verfify that the internal in-line NIBP pneumatic and not kinked, then the internal components are properly installed, with no tubing might be blocked. pinching or kinking of tubing. “Removing the NIBP assembly from the main board” on page 41.

“Equipment Alert. NIBP Fault. Overpressure condition.“

A transient pressure pulse was introduced into the cuff via sudden and excessive patient motion.

“Equipment Alert. NIBP Fault. Calibrating. Please wait.“

An NIBP measurement was Wait 45 seconds after turning on the monitor attempted within 45 seconds of before starting an NIBP measurement. monitor power-up.

Restart the monitor.

An NIBP measurement was attempted while the NIBP system was performing a baseline calibration.

Wait 15 seconds and retry the NIBP measurement.

Excessive cuff artifact.

Reduce patient motion.

Excessive artifact. “Equipment Alert. NIBP Fault. NIBP subsystem failure. Service required. NIBP disabled.“ The NIBP system self-test has failed 3 times without passing.

Minimize patient motion.

“Calibrating. Minimize motion.“

Send the monitor to an authorized Welch Allyn Service Center for service. (See “Returning products” on page 6.)

14

Troubleshooting and repair

Welch Allyn Propaq LT Vital Signs Monitor

Radio Radio-equipped Propaq LT monitors support wireless connection to one of the two types of Acuity networks. Model

Wireless connection

802LTRN, 802LTRS

802.11 FHSS Acuity network

802LTAN, 802LTAS

802.11a Acuity network

802LT0N, 802LT0S

none

In facilities with 802.11a networks, administrators can reconfigure the radio, the Acuity network, or both, to meet local security or policy requirements. When you send a model 802LTAN or 802LTAS monitor to Welch Allyn for service, the radio is reset to the factory configuration. Caution If you send a model 802LTAN or model 802LTAS monitor to Welch Allyn for service and the monitor is then returned to you, you must reapply any custom radio settings to the monitor before you attempt to reconnect the monitor to your Acuity network. Radio troubleshooting information applies only to radio-equipped monitors. It is not intended for comprehensive troubleshooting of the Acuity system. To troubleshoot the Acuity system, refer to the appropriate Acuity service contact for your system. Symptom

Possible Cause

No Acuity connection-network Wireless communication disabled communication icon ( ) is not in the monitor configuration. displayed on the monitor screen. No Acuity connection-network communication icon with slash ( ) is displayed on the monitor screen and the yellow indicator above the screen is lit.

Possible Corrective Action Use the configuration utility to enable wireless communication for the monitor.

Monitor is out of radio range. Move the monitor within range of an Acuity 802LTRN/S: RSSI > approx. 60. access point. 802LTAN/S: RSSI > approx. 70. Netname (ESSID) set wrong.

Set the monitor network name to the Acuity network name. (Default: com.protocol.)

USB connected to the monitor through the cradle.

Disconnect the USB cable from the cradle.

No Acuity connection-network Monitor is intentionally disconnected from the network by communication icon with slash the user. ( ) and “Disconnected” are displayed on the monitor screen, and the green indicator above the screen is flashing.

Use the monitor interface to connect to the network.

Radio Monitoring service screen persistently displays “Searching for access point”; monitor displays ( ).

Move the monitor within range of an access point on the current network.

Monitor radio cannot find a signal from the network.

Verify the Netname.

Radio Monitoring service screen persistently displays “Searching for access point” and “Radio sleeping”; monitor displays ( ). (802LTAN/802LTAS) Display alternates between “search” and “radio sleeping”.

Move within range of an access point and wait for up to 3 minutes.

The monitor Netname does not match the Acuity network name.

Set the monitor Netname to the Acuity network name (default: com.protocol).

Service Manual

Troubleshooting and repair

Symptom

Possible Cause

Radio Monitoring service screen Invalid authentication credentials; persistently displays “Searching default network settings. for access point”; monitor displays ( ). (802LTAN/802LTAS) Invalid authentication credentials; custom network settings.

15

Possible Corrective Action Reset the monitor radio to factory defaults: 1. 2. 3.

Enter the service screen. Press simultaneously Select Yes and press .

.

Refer to your Acuity network administrator.

Radio Monitoring service screen DHCP server is down. persistently displays “Requesting an IP address” and ( ) is DHCP server has no more displayed on the monitor. addresses.

Contact Welch Allyn Acuity technical support. (See page ii.)

Radio Monitoring service screen persistently displays “Sending Acuity broadcast.”

Wait.

All Acuity systems with wireless are unavailable.

Contact Welch Allyn Acuity technical support. (See page ii.)

The Acuity system is at capacity for Turn off another wireless monitor. licenses.

Frequent communication faults Faulty antenna or poor antenna with no apparent cause. On the connection. Radio Monitoring service screen, TX/RX errors (PERCENT) is > 5%. Faulty radio connection.

Poor radio coverage.

Send the monitor to an authorized Welch Allyn Service Center for service. (See “Returning products” on page 6.) Send the monitor to an authorized Welch Allyn Service Center for service. (See “Returning products” on page 6.) Verify that the network has a sufficient density of access points on the current network.

16

Troubleshooting and repair

Welch Allyn Propaq LT Vital Signs Monitor

Battery states and service State

Description

Type of State

Possible Corrective Action

0

Battery state unknown.

Normal transitory. Should not persist.

If the state persists, replace the battery pack. “Removing the lithium ion battery assembly” on page 29.

1

Battery voltage too high. Fault-possible cell imbalance Replace the battery pack (“Removing the (Indication can occur with the or charger fault lithium ion battery assembly” on page 29) monitor in or out of the cradle.) or the cradle power board (“Disassembling the cradle” on page 47).

2

Battery fully charged.

Normal operating state.

3

Battery partially charged.

Normal operating state.

4

30 minutes of charge remaining, undocked.

Normal operating state.

5

30 minutes of charge remaining, docked.

Normal transitory state.

6

5 minutes of charge remaining, Normal operating state. undocked.

7

5 minutes of charge remaining, Normal transitory state. docked.

8

Battery is exhausted, undocked.

Normal operating state.

9

Battery is exhausted, docked.

Normal operating state.

10

Battery voltage is too low for recharging, docked.

Faulty battery pack.

Replace the battery pack. “Removing the lithium ion battery assembly” on page 29.

Service Manual

Troubleshooting and repair

17

Charger states and service State Description

Charger Charger Type of State Status Power LED LED

Possible Corrective Action

0

Charger state unknown.

n/a

n/a

Normal initial transitory state of very short duration.

n/a

1

Monitor docked, No-power fault.

Off

Off

Normal operating state when the monitor is in the cradle and the cradle is not powered.

If the power adapter is not connected, connect it.

Fault state if the cradle fuse is open.

Replace the fuse. “Replacing the fuse” on page 47.

Yellow

On

Fault-power to the monitor Attempt to recharge by removing automatically disconnected by the the monitor from the cradle and cradle. Possible monitor fault. reinserting the monitor in the cradle. If the fault persists, attempt to recharge another monitor to determine whether the problem is with the cradle or with the monitor main board. Fault-no monitor in the cradle, power input and input fuse OK.

Power board fault. Replace the power board. “Disassembling the cradle” on page 47. n/a

2

Monitor docked, charging.

Green

Green

Normal operating state.

3

Monitor docked, temperature fault.

Yellow

Green

Fault-battery pack temperature is Bring the battery pack out of range high or low. temperature into specified range (0° C - 40° C).

4

Monitor docked, battery voltage too low for charging.

Yellow

Green

Fault-battery pack can no longer Replace the battery pack. be charged. “Removing the lithium ion battery assembly” on page 29.

5

Monitor docked, timeout fault.

Yellow

Green

Fault-Battery pack failed to charge within the specified time.

Attempt again to charge by removing the monitor from the cradle and reinserting the monitor in the cradle. Replace the battery pack. “Removing the lithium ion battery assembly” on page 29.

6

Monitor docked, charging complete.

Off

Green

Normal operating state.

n/a

7

Monitor docked, overcharge fault.

Yellow

Green

Fault-battery pack cells are unbalanced or the cradle is faulty.

Replace the battery pack (“Removing the lithium ion battery assembly” on page 29). Replace the power board in the cradle (“Disassembling the cradle” on page 47).

8

Monitor not docked.

n/a

n/a

Normal operating state.

n/a