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Troubleshooting Guide
WARNING: WHEN SERVICING THE OUTDOOR UNIT, BE SURE TO TURN OFF POWER TO THE INDOOR UNIT.
The outdoor disconnect switch will not cut low voltage power, and damage to the control board will occur if
the main heat pump breaker is not turned off during service.
The following steps are for troubleshooting the pool conditioner. If the problem is with the plenum heater, proceed to that
section at the end of the troubleshooting guide. Repair procedures and reference refrigeration circuit diagrams can be
found later in this manual.
STEP 1:
Verify that the LCD Interface is functioning . If it is not, proceed to POWER SUPPLY TROUBLESHOOTING, otherwise
proceed to STEP 2.
STEP 2:
Record the alarm shown on the LCD Interface or use the PC App Alarms page to determine the alarm type. Proceed to
the ALARMS and/or FAULTS TROUBLESHOOTING section.
STEP 3:
If there are no alarms and STAGE1 is showing ON (LCD Interface, PC App or LED on control board) but the compressor is
not operating, does not attempt to start, attempts to start but cannot, starts hard, or starts but does not sound normal, pro-
ceed to the COMPRESSOR TROUBLESHOOTING section.
STEP 4:
If the compressor starts and sounds normal, the compressor is OK and the problem lies elsewhere. Proceed to the OPER-
ATION TROUBLESHOOTING section.
NOTE:
To speed up the troubleshooting process, if using the PC Application, click on SC Override to reduce the short cycle timer
to 10 seconds.
POWER SUPPLY TROUBLESHOOTING
Fault
No power
Disconnect switch open
(if installed).
Fuse blown /
breaker tripped.
No heartbeat on
Transformer breaker
control board
tripped (or fuse blown for
those without breaker).
Faulty transformer.
Faulty control board.
No display on air
No power from control
thermostat
board.
Faulty wiring between
heat pump and thermo-
stat.
Faulty thermostat.
ISSUE 03: 1-Oct-2021
Possible Cause
Verify disconnect switch is in the
ON position.
At disconnect box, voltmeter
shows 230VAC on the line side
but not on the load side.
Breaker on transformer tripped
(or fuse looks burnt).
Transformer breaker is not
tripped (or fuse not blown),
230VAC is present across L1 and
L3 of the compressor contactor
but 24VAC is not present across
24VAC and COM of the control
board.
24VAC is present across 24VAC
and COM of the control board.
See No heartbeat on control
board.
24VDC is not present across
POWER and GND at the thermo-
stat.
24VDC is present across POW-
ER and GND at the thermostat
but thermostat has no display.
Verification
Page 48
Recommended Action
Determine why the disconnect
switch was opened; if all is OK
close the switch.
Reset breaker or replace fuse
with proper size and type. (Time-
delay type "D")
Push reset button. If it trips again
locate cause of short circuit and
correct (or replace fuse) .
Replace transformer.
Replace the control board.
Correct the wiring.
Replace thermostat.
002291MAN-03
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