40
Installation and User’s Guide
Fault Condition
Possible Cause
Corrective Action
1. Bad transformer
Supply voltage to the transformer should be between 208 and 260
volts. Transformer should output between 24 and 28 volts. If below this
range, replace transformer.
2. Insufficient supply voltage to the heat pump.
Check supply voltage to the heat pump. Supply voltage should be
between 208 and 260 volts. Check to see if a phase is out. Should
have 120 volts to ground and 240 volts across power legs.
1. Water circulation pump not on.
Verify water pump is on.
2. Insufficient water flow.
Verify filter and skimmers are clean, backwash if necessary. Minimum
flow 30 GPM.
3. External bypass open.
Verify external water bypass around heat pump is closed. Also make
sure all other valves are open or in the proper positions to allow proper
water flow through heat pump.
4. Bad refrigerant high pressure switch.
Check resistance of switch, if open, replace switch.
5. TXV Stuck Closed
1. Disconnect TXV bulb from suction line (SL), have it in your hand, if
pressures go back to normal, then reinstall the bulb on suction line (it
may have some debris stuck in the port). For adjustable TXVs open
adjustable valve, it may remove the debris a
6. Other Possibilities:
Check Water level in pool. This condition may appear if the heat pump
has NOT been operated for an extended period. To Clear this
condition, cycle the heat pump on and off up to 3 times. If this does not
correct problem, call for service.
7. Other Possibilities. 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 t
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 restrictio
8. Unit overcharged.
Reclaim charge. Recharge with appropriate nameplate charge
1. Low refrigerant in system.
Find source of refrigerant leak and fix. Pull vacuum and recharge.
2. Air and water temperatures too cold to operate the
heat pump.
Wait until temperatures warm up and see if unit operates.
3. Bad refrigerant low pressure switch.
Check resistance of switch with a full charge, if open, replace switch.
4. Faulty fan blade.
Check the capacitor and fan motor. Replace either one if it is faulty.
Check the fan blade and make sure it is not slipping or broken. If so,
replace the fan.
5. TXV Stuck Closed
1. Disconnect TXV bulb from suction line (SL), have it in your hand, if
pressures go back to normal, then reinstall the bulb on suction line (it
may have some debris stuck in the port). For adjustable TXVs open
adjustable valve, it may remove the debris and set it back to original
position.
2. If (1) does not work, recover the charge, remove bulb from SL,
unscrew TXV head, shake it, if rattles, replace head (PN KT-45-ZGA),
if not, replace TXV and filter dryer and charge appropriately.
FIVE ALARMS:
Indicates that 5 faults have
occurred in one hour. This fault will
automatically reset in one hour or can be
manually reset by pressing the ON/OFF
button.
5 alarms of any kind within one hour.
Press the ON/OFF button to clear the alarm. Check Heat Pump over
the next few minutes/hours to see if alarm appears again. This alarm
most likely caused the five alarms in one hour.
BROWNOUT Alarm:
The 24 VAC supply
voltage to the control board is low.
CAUTION:
High Voltage Checks. Observe extreme
caution or call dealer or factory for advice
before attempting to Troubleshoot Electrical
Box.
HIGH REFRIG Alarm:
Refrigerant high
pressure switch is open.
LOW REFRIG Alarm:
Refrigerant low
pressure switch is open.