Aquacal HeatWave SuperQuiet SQ120R, Operation Manual

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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 Only Units:
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The heat pump may develop a fine layer of white frost on the outside coil before entering the defrost
mode. This is normal.
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See " Displays Defrosting " on page 41.
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If heavy ice (not frost) starts to build up, shut off the heat pump. Contact the installer or manufacturer.
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If the ambient air temperature will be falling below 32° F (0° C) for more than 8 hours, winterize
equipment.
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See " Winterizing " on page 31.
Cool Only Units
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The heat pump may enter defrost mode if the water flow rate falls below the acceptable range. See
" Water Flow Rates " on page 26.
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If the ambient air temperature will be falling below 32° F (0° C) for more than 8 hours, winterize
equipment.
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See " Winterizing " on page 31.
Heat and Cool Units (with Active Defrost or “Icebreaker”):
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During freezing conditions, pool or spa heating will continue. Frost or ice may develop during the
“countdown” to the active defrost (up to 50 minutes). This is normal.
See " Displays Defrosting " on
page 41.
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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
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.
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If the ambient air temperature is (or will be) falling below 32° F (0° C) for more than 8 hours,
winterize equipment.
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See " Winterizing " on page 31.
"Pool / Spa" Button Will Not Work
ISSUE
The "Pool / Spa" button is disabled if the following devices have been configured on the heat pump.
Check with installer if unsure of devices enabled on heat pump.
RESOLUTION
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A 2-wire external controller.
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A 3-wire external controller.
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An external flow switch.
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