Covidien WarmTouch - Figure 11-1 Thermistor Sensor Assembly; Figure 11-8 Thermostat; Figure 11-13 Thermostat Cable

Basic Troubleshooting
Service Manual 6-11
Heater not operating • Check the error codes on the System Information screen
(page 1-9), and perform recommended corrective actions
(page B-1).
• Check the heater cable connection to the power PCBA
(page 10-31).
• Try replacing components in the following order:
1. Heater (page 11-43).
2. Power PCBA (page 10-31).
Thermostat test failure
(thermostat fails to open)
• Check the error codes on the System Information screen
(page 1-9), and perform recommended corrective actions
(page B-1).
• Check the thermostat cable connection to the power PCBA and
to the thermostat terminals (page 11-14).
• Try replacing components in the following order:
1. Thermostat (page 11-9).
2. Power PCBA (page 10-31).
3. Thermostat cable (page 11-14).
Temperature accuracy test
failure
(output air temperature not
within specification)
• Check the error codes on the System Information screen
(page 1-9), and perform recommended corrective actions
(page B-1).
• Check the thermistor cable connection to the power PCBA
(page 11-3).
• Make sure that the thermistor wire and rivet are correctly
attached to the hose duct adapter (page 11-4).
• Check the heater cable connection to the power PCBA
(page 10-31).
• Try replacing components in the following order:
1. Thermistor sensor assembly (page 11-3).
2. Power PCBA (page 10-31).
Electromagnetic interference
between the warming unit
and other devices
• Check the error codes on the System Information screen
(page 1-9), and perform recommended corrective actions
(page B-1).
• Advise the customer to try increasing the distance between
devices, repositioning the cabling, or plugging the devices into
separate outlet circuit branches. See Electromagnetic Compati-
bility (EMC) on page 13-4 for additional guidance.
Table6-1.Warming Unit Problems and Resolutions (Continued)
Problem Resolution