(3) Run all applicable tests before assuming Module or Compressor to be faulty.
B: Compressor Not Running, No Start Attempt.
| Probable cause | Action |
1 Supply voltage too low | Check voltage with a digital | |
|
| at the terminals on the Module. This |
|
| must be 11.7v or more for a 12v supply |
|
| & 24v or more for a 24v supply. Inspect |
|
| power supply, ground connections & |
|
| components for integrity. Check wire |
|
| sizing. Charge batteries if necessary. |
2 Supply voltage too high | If a 12v supply is faulty & delivers over | |
|
| 17v, the compressor will not run. If it is |
|
| over 24v, it will assume that it is a 24v |
|
| supply & act accordingly. |
3 | Polarity incorrect | Check that the polarity is correct at the |
|
| Module. |
4 | Faulty thermostat | Remove the thermostat wires & jumper |
|
| the terminals that they were on together |
|
| temporarily. If the system then runs, |
|
| make the connection permanent & |
|
| control the system manually from the |
|
| breaker on your supply panel. Replace |
|
| thermostat as soon as possible. |
5 | Thermostat wired | Refer to the installation instructions & |
| incorrectly, or faulty | confirm that connections are as they |
| connections. | should be. Ensure that the thermostat |
|
| connectors are pushed firmly on to the |
|
| Module terminals. |
6
Check to make sure that the 2 connectors at the rear of the
7 | Remove board & jumper terminals C & |
(if fitted) | T on the Module. Note; If the thermostat |
**Optional Part ** wires are connected directly to C & T on the Module, the compressor will run at its slowest speed.
8 Compressor plug not | Disconnect the Module by removing the |
