Aquacal HeatWave SuperQuiet SQ120R, Installation Manual

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HIGH PRESSURE FAULT
ISSUE
The refrigerant system’s high-pressure switch is showing as open.
RESOLUTION
Heat Only Units
Place heat pump in heating mode and perform the following troubleshooting.
Determine if an insufficient amount of water is being supplied to the equipment.
1. Confirm the filter pump is on.
2. If a multiple-speed filter pump is being used, run filter pump at a higher speed. Do not exceed the
maximum flow rate for the model.
3. Confirm water is not being diverted away from the heat pump.
l
See " Water Flow Rates " on page 11.
l
See " Adjusting Water Flow Using ΔT (Delta-T) " on page 13.
4. The water pressure switch may be incorrectly calibrated.
l
See " Adjusting Water Pressure Switch " on page 15.
Cool Only Units
Determine if an insufficient amount of air is being supplied to the equipment.
1. Check for proper fan operation. If the fan is not operating, contact AquaCal
®
Technical Support.
2. Check for obstructed airflow around the heat pump.
l
See " Clearances " on page 5.
3. Check for a dirty or blocked evaporator coil.
l
See " Cleaning Equipment After Installation " on page 62.
Heat and Cool Units (Reversing)
Place heat pump in heating mode and perform the following troubleshooting.
Determine if an insufficient amount of water is being supplied to the equipment.
1. Confirm the filter pump is on.
2. If a multiple-speed filter pump is being used, run filter pump at a higher speed. Do not exceed the
maximum flow rate for the model.
3. Confirm water is not being diverted away from the heat pump.
l
See " Water Flow Rates " on page 11.
l
See " Adjusting Water Flow Using ΔT (Delta-T) " on page 13.
4. The water pressure switch may be incorrectly calibrated.
l
See " Adjusting Water Pressure Switch " on page 15.
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