Carrier 30AWH004H - GMC Board Alarm Codes

14 30AWH
Fault
Code
Description
2 Safety Input
3 Enter water Temperature Sensor (EWT)
4 Actual Refrigerant Temperature Sensor (TR)
5 Outdoor Air Sensor of GMC
6 Loss communication to NUI control
7 NUI control Room Sensor
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14 Loss of Signal From inverter board or High Temperature Release
15 Exit water Temperature Sensor (LWT)
16 Alarm Test
17 Inverter Air Sensor (TO)
18 G-Tr inverter short circuit protection
20 Compressor position Detection Circuit error
21 Inverter Current Sensor error
22 Heat Exchanger Sensors (TE) / (TS)
23 Discharge Temperature Sensor (TD)
24 Outdoor Fan motor error
26 Other unit error
27 Compressor Lock
28 Discharge Temperature error
29 Compressor Breakdown
System test
GMC Board Alarm Codes (Fig. 16)
There is an LED on the GMC board that displays any board errors.
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following table. In the case of more than one error, the error with
the highest priority will be displayed until it is resolved.
In the case of normal operation, the LED ashes at a frequency of ½
Hz. In the case of an error, the LED remains o for 4 seconds, then at
a frequency of 1Hz, it ashes a number of times equal to the error
code and than remains o again for 6 seconds. If the error code
has 2 digits, the ashing is interrupted for 2 seconds between the
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Example: error 23: LED o for 4 seconds. 2 ashes at a frequency
of 1Hz. O for 2 seconds. 3 ashes at a frequency of 1Hz. O for
6 seconds. The cycle repeats until the LED turns o because the
problem is resolved or if an error with higher priority occurs.
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