ClimateMaster Heat Pump: Heating / Cooling
Re: Code 7
Code 7 = Under or Over Voltage
- An over/under voltage condition exists when the control voltage is outside the range of 18VAC to 31.5VAC.
- Over/under voltage shut down is a self-resetting safety. If the voltage comes back within range for at least 0.5 seconds, normal operation is restored.
- This is not considered a fault or lockout. If the CXM is in over/under voltage shutdown for 15 minutes, the alarm relay will close.
| Qty |
Possible Causes: |
|
High or Low Line Voltage |
|
Transformer Mis-Wired |
CHECKOUT:
1. Check Line Voltage
- Check the inlet line voltage.
- Acceptable range = 200 - 240VAC
2. Check Transformer Wiring
- Most transformers have separate wiring terminals for 208V and 230V.
- Ensure that the transformer is wired properly for the actual inlet voltage.