Aquacal GBB, Installation Manual

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DEFROST1 SENSOR SHORT
or
DEFROST2 SENSOR SHORT
ISSUE
Shorted defrost sensor.
RESOLUTION
A qualified technician should replace the defrost sensor.
ERROR AT MASTER UNIT
ISSUE
The heat pump is slaved to a master heat pump that is displaying a fault code.
RESOLUTION
The error at the master heat pump must be corrected before the slaved unit will resume operation.
HIGH PRESSURE FAULT
ISSUE
The refrigerant system’s high-pressure switch is showing as open.
RESOLUTION
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 12.
4. The water pressure switch may be incorrectly calibrated.
l
See " Adjusting Water Pressure Switch " on page 13.
HIGH WATER TEMPERATURE
ISSUE
Incoming water temperature has exceeded 110° F (43° C) and the unit has been deactivated. The heat
pump will not operate until the incoming water temperature drops to 100° F (38° C) or lower.
RESOLUTION
1. Determine if a gas heater is sending water directly to the heat pump. This situation would need to be
corrected before continuing.
2. If a solar heater is sending water directly to the heat pump, the water can initially be hotter than 110° F
(43° C). After the water from the solar panel normalizes, the fault will no longer display and the heat pump
will resume as needed.
3. If the
HIGH WATER TEMPERATURE
fault continues to display, the water temperature sensor may
require replacement.
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