Pentair ThermalFlo - Manual (Page 33)

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ThermalFlo Installation and User’s Guide
Section 5
Troubleshooting
Use the following troubleshooting information to resolve possible problems with your ThermalFlo heat pump.
WARNING — RISK OF ELECTRICAL SHOCK OR ELECTROCUTION.
Improperly installation will create an electrical hazard which could result in death or serious injury
to pool users, installers, or others due to electrical shock, and may also cause damage to property.
Do NOT attempt any internal adjustments inside the heater.
1. Keep your hands and hair clear of the fan blades to avoid injury.
2. If you are not familiar with your pool filtering system and heater:
a. Do NOT attempt to adjust or service without consulting your dealer, professional pool or air
conditioning contractor.
b. Read the entire Installation & User’s Guide before attempting to use, service or adjust the
heater or pool filtering system. The water pressure switch should be adjusted to turn the
heater off when the pump is off. Setting the switch to close at too low of a flow can damage the
appliance. Adjust the switch to turn the heater off, not on.
Note: Turn off power to unit prior to attempting service or repair. Problems and Corrective Action
Problem Possible Cause Corrective Action
All control lights off.
Unit will not start.
Remote, Pool or Spa light ON.
Water Pressure light OFF.
Thermostat light ON.
Unit will not start.
Water Temperature not hot enough.
Remote, Pool or Spa light ON.
Water Pressure light ON.
Thermostat light OFF.
Unit will not run.
Remote, Pool or Spa light ON.
Water Pressure light ON.
Thermostat light ON.
Unit will not start.
OR
Unit is forming ice or frost on the
outer air coil, usually at the bottom.
No power supply to heater. Tripped breaker or
blown fuse. Control failure.
Low water flow through heater. Dirty or worn
filters or clogged lint traps. Clogged filter pump
impeller. Improper plumbing valve settings.
Suction leak allowing air into the water flow.
Internal water pressure switch failure.
Thermostat is not set higher than the pool/spa
water temperature. The water temperature has
reached the current setting. The thermostat is
malfunctioning. The pool/spa select switch
is not
in the correct mode.
Outside air temperature below operating range
of 45° F. Discharge air flow is restricted.
Discharge air is accumulating and being drawn
back through the outer air coil. The fan is
obstructed, low air flow. Large amounts of roof
run off water restricting fan blade rotation.
Sprinklers spraying on the outer air coil during
cooler temperatures. Outer air coil clogged with
debris. Plants too close to heater, blocking air
flow. Low refrigerant pressure caused by a
Freon
™ leak. Possible malfunctioning of the
internal low refrigerant pressure switch.
Reset breaker. Replace fuse. Call dealer for advise.
Call factory for advise.
Clean entire filtering system and or replace filter
element. Inspect & clean pump impeller. Adjust
plumbing valves. Repair suction air leaks, grease
pump lid o-ring. Replace filter. Replace water pressure
switch. Check water pressure switch adjustment.
Increase set point temperature. Maximum water
temperature is 104° F. Call your dealer for advise.
Call the factory for advise.
Do not try to operate the heater when the outside air
temperature drops below 50° F. Make sure heater is
installed with the required placement clearances for
air flow and roof clearance. Do not install indoors.
Make sure that your sprinklers do not spray on the
heater in any way what so ever. If ice forms on the
outer coil, shut the heater off and allow ice to thaw.
You may use water at low pressure to thaw ice build
up on the outer coil, shut the heater off when doing
so. Call the factory for advice.