Aquacal GBB, Installation Manual

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HP5 SYSTEM LOCKOUT
ISSUE
The heat pump has locked due to five high-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 high-pressure issue causing the error.
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See " HIGH PRESSURE FAULT " on the previous page.
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, contact AquaCal
®
Technical Support.
2. Check for obstructed airflow around the heat pump.
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See " Clearances " on page 5.
3. Check for a dirty or blocked evaporator coil.
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See " Cleaning Equipment After Installation " on page 52.
4. Check for signs of heavy ice buildup on the coil.
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.
l
See " LOW PRESSURE FAULT " above.
MULTI-UNIT COMM FAULT
ISSUE
Slaved heat pump is not receiving a signal from the master heat pump.
RESOLUTION
1. Confirm the master heat pump is operating correctly. If, for example, no power is supplied to the master
heat pump, an error will appear on the slaved heat pumps.
2. Confirm the heat pump is properly connected and configured to a master unit.
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See " Connecting Multiple Heat Pumps (Master / Slaved) " on page 34.
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