Heat Pump Is Running, Not Cooling; Ice Forming On The Heat Pump - Aquacal GBB Series Operation Manual

Heat Pump Is Running, Not Cooling

ISSUE
The heat pump is running. But the water is not cooling.
RESOLUTION
1. If the heat pump is using an external controller, confirm the heat pump is programmed properly to
allow for cooling.
See "Operating Heat Pump (With an External Controller)" on page 19.
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2. Confirm the heat pump mode is set to cool.
3. Confirm the thermostat is set below the current water temperature.
4. Confirm valves are positioned to cool the correct body of water (either the pool or the spa). If cooling a
spa that overflows into a pool, confirm the spa is isolated when being cooled (not flowing into the
pool).
5. If an error code is displayed, determine and correct the condition causing the code.
See "Fault Codes" on page 33.
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6. Confirm heat pump is transferring heat out of the water.
Measure the temperature of air discharge coming out of heat pump's fan. If the air is between 8° to
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10° warmer than the outside ambient air, the heat pump is moving heat out of the water.
7. Confirm that filter pump has a sufficient run-time. The heat pump will not run (or cool the
water) without water flow.
See "Cooling Recommendations" on page 44.
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Ice Forming on the Heat Pump

Ice Forming on the Heat Pump
ISSUE
When conditions are too cold for proper operation, the heat pump will enter a defrost mode. This
prevents ice from building up on the evaporator coil.
RESOLUTION
Heat and Cool Units (with Active Defrost or "Icebreaker"):
During freezing conditions, pool or spa heating will continue. Frost or ice may develop during the
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"countdown" to the active defrost (up to 50 minutes). This is normal. See "Displays Defrosting" on
page 37.
The heat pump will enter an "active defrost" stage to remove the accumulated frost and ice.
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Be sure to observe the unit for at least 50 minutes. If it has not entered an active defrost cycle, call
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for service.
TIP:
The heat pump can be manually set to defrost by temporarily switching to the
cooling mode until the ice or frost melts.
If the ambient air temperature is (or will be) falling below 32° F for more than 8 hours, winterize
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equipment.
See "Winterizing" on page 31.
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