Hpc Temp System Lockout; Low Pressure Fault; Lp5 System Lockout - Aquacal Water Source WS03 Installation Manual

HPC TEMP SYSTEM LOCKOUT

ISSUE
The heat pump's controller board is overheating.
RESOLUTION
A qualified technician should be contacted to correct the issue.

LOW PRESSURE FAULT

ISSUE
The refrigerant system's low-pressure switch is showing as open.
RESOLUTION
Heat and Cool Units (Reversing)
Place heat pump in heating mode and perform the following troubleshooting.
1. Check for proper fan operation. If the fan is not operating, call for service.
2. Check for obstructed airflow around the heat pump.
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3. Check for a dirty or blocked evaporator coil.
See "Cleaning Equipment After Installation" on page 1
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4. Check for signs of heavy ice buildup on the coil.
If the heat pump is a reversing unit, place it 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.
See "Water Flow Rates" on page 11.
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See "Adjusting Water Flow Using ΔT (Delta-T)" on page 61.
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LP5 SYSTEM LOCKOUT

ISSUE
The heat pump has locked due to five low-pressure faults during one call for heating or cooling.
RESOLUTION
1. Deactivate then reactivate power to the heat pump to clear error.
2. Troubleshoot the low-pressure issue causing the error.
See "LOW PRESSURE FAULT" above.
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