Thermo King 914970, Manual

Page: 51 / 186

Electronic Controls
51
Displaying and Clearing Alarm
Codes
When the TG-V controller senses an alarm
condition, a flashing alarm symbol appears on the
display. A two digit alarm code is used to identify
the type of alarm.
1. To display the alarm code, repeatedly press
and release the
S
ELECT
key until the alarm
screen is displayed.
• If more than one alarm has been sensed,
all alarm codes present will automatically
alternate on the screen.
• The following alarm codes are used:
03 Return Air Sensor Failure
The Return Air Sensor has failed or is
disconnected.
03A Return Air Sensor Failure
The Return Air Sensor has failed or is
disconnected (Zone 2).
04 Discharge Air Sensor Failure
(Optional)
The Discharge Air Sensor has failed or is
disconnected.
14 Defrost Circuit Failure
The unit is still in defrost after the end of
the defrost time limit, indicating a defrost
circuit failure.
25 Battery Charging Alternator Failure
Current output from the unit alternator is
NOT being sensed.
29 Defrost Initiation Failure
This code indicates that the unit attempted
to enter defrost three times in rapid
succession indicating a shorted air switch,
shorted manual defrost switch or other
defrost circuit failure.