Defrost1 Sensor Short Or Defrost2 Sensor Short; Error At Master Unit; High Pressure Fault; High Water Temperature - Aquacal Leisure Temp LT55 Installation Manual

DEFROST1 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 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.
See "Water Flow Rates" on page 13.
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See "Adjusting Water Flow Using ΔT (Delta-T)" on page 15.
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4. The water pressure switch may be incorrectly calibrated.
See "Adjusting Water Pressure Switch" on page 16.
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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
require replacement.
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DEFROST2 SENSOR SHORT
or
fault continues to display, the water temperature sensor may