ULTRATEMP
®
Heat Pump Installation and User’s Guide
29
Problem or Symptoms
Possible Cause
Corrective Action
Unable to turn Heat Pump ON. Display is
Blank. Unit will NOT start.
Control failure. No power supply to heater.
Tripped breaker or blown fuse. Faulty
Transformer. Incorrect Wiring.
Reset breaker. Replace fuse. Call dealer or factory for advice
before attempting to replace parts. Replace Transformer.
Check wiring.
Unit power is ON, green light ON, and Set
Temperature is above Actual. Unit will NOT
start to heat or cool. No Alarms.
Remote feature enabled, but no controlling
device hook-up. Control failure.
Heat pump not turned on.
Check to see if the Remote feature on the Control Board is
enable. Disable if needed. See Section 3 for more information
on disabling Remote function. Call dealer or factory for advice
before attempting to replace parts. Replace Control Board.
Unit power is ON, green light ON, and Set
Temperature is above Actual. Unit will NOT
start to heat. No Alarms.
Heat Pump pool/spa selection mode incorrect.
The thermostat is malfunctioning. Control Board
Failure.
Check to see if heat pump is in correct active pool/spa mode
by pressing the pool/spa button. If active mode is spa, but
trying to heat/cool pool press pool/spa button again to change
the active mode to pool. If active mode is Pool, but want spa
heat change active mode to spa. Call dealer or factory for
advice before attempting to replace parts. Replace thermostat.
Replace Control Board.
Unit power is ON, green light ON, and Set
Temperature is above Actual. Unit cycles
on and off, i.e. Compressor cuts on briefly
and then off after Five minute delay before
set point is reached.
Faulty Compressor. Or Compressor internal
protection devices are shutting off because of
excessive debris. Faulty Compressor contactor.
Incorrect wiring. Control Board Failure. Internal
bypass valve damaged or clogged with debris.
Heat exchanger clogged with debris. Suction
leak allowing air into the water flow. Unit is
plumbed backwards.
Clean entire filtering system and or replace filter element.
Inspect & clean pump impeller. Adjust all plumbing valves.
Repair suction air leaks, grease pump lid O-ring. Replace filter.
Wrong filter pump pipe size. Automatic pool vacuum causing
restriction. Call your dealer or factory for advice if corrective
action does not solve the problem. Possible Compressor’s
internal relief valve or overload protection device is faulty. Call
dealer or factory for advice before attempting to replace parts.
Replace Compressor.
Unit is forming ICE or Frost on the outer
air coil, usually at the bottom.
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.
Sprinklers spraying on the outer air coil during
cooler temperatures. Outer air coil clogged with
debris. Plants too close to heater, blocking dis-
charge air flow. Low refrigerant pressure caused
by a Refrigerant leak. Possible malfunctioning
of the internal low refrigerant pressure switch.
Check Alarm Status on Control Board for LOW
REFRIG Alarm.
The outside air temperature too low and Defrost feature is
NOT enable. Malfunctioning Defrost Thermistor. 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 your dealer or factory for advice corrective
action does not solve the problem.
Unit power is ON, and Set Temperature
is above Actual. Fan is NOT Turning. No
Alarms.
Faulty Fan Relay. Faulty Capacitor. Faulty Fan
Motor. Control Board Failure. Incorrect wiring.
Call dealer for advice before attempting to replace parts.
Replace Fan relay. Replace Capacitor, Replace Fan motor.
Replace Control Board.
Fan is turning, no cool air discharge out of
top of heater. Unit ON, and Set Tem-
perature is above Actual, but Unit is not
heating. No Alarms.
Heat Pump is in the five minute safety delay and
Compressor has not started. Faulty Compres-
sor. Faulty Capacitor. Compressor contactor
is stuck open. Control Board failure. Incorrect
wiring.
Call dealer or factory for advice before attempting to replace
parts. Replace Capacitor. Replace Control board. Replace
Contactor. Replace Compressor.
“Spa will not heat to maximum
temperature of 104° F.
Thermostat is turned all the way up.
OR
Spa is heating very slowly.”
Low or restricted 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. Low water flow when switched to
spa mode or the control is not in spa mode. Unit
is plumbed backwards. Heat exchanger clogged
with debris. Internal bypass valve damaged or
clogged with debris. Your spa thermometer is
not reading the correct temperature. Air blower
is running. Venturi air inlets are open. It is very
cold outside. Spa pump is not running.
Clean entire filtering system and or replace filter element.
Inspect & clean pump impeller. Adjust all plumbing valves.
Repair suction air leaks, grease pump lid O-ring. Shut off air
blower and or Venturi inlets that allow air turbulence in the
spa. Use a cover while heating the spa. Outside air temp. too
cold. Set spa pump timer for longer time. Call your dealer for
advice. Call the factory for advice.
“Pool is heating very slowly.
Pool is not getting up to temperature.”
“Low or restricted 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. It is cold outside. Pool pump timer
is not set for a long enough running period.
Pool is not covered. High wind speed over pool.
Shaded pool area.”
Clean entire filtering system and or replace filter element.
Inspect & clean pump impeller. Adjust all plumbing valves.
Repair suction air leaks, grease pump lid O-ring. Use a pool
cover. Place a wind break around pool. Set pool pump timer
longer. Call your dealer for advice. Call the factory for advice.
