40
UltraTemp
®
Heat Pump Installation and User’s Guide
Problems or Symptoms
Possible Cause
Corrective Action
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.
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. Insuffi cient 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.
HIGH REFRIG Alarm
: Refrigerant high
pressure switch is open.
1. Water circulation pump not on.
Verify water pump is on.
2. Insuffi cient water fl ow.
Verify fi lter and skimmers are clean, backwash if necessary.
Minimum fl ow 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 fl ow 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 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 fi lter dryer
and charge appropriately.
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 fl ow
through heater. Dirty or worn fi lters or clogged
lint traps. Clogged fi lter pump impeller. Improper
plumbing valve settings. Suction leak allowing air
into the water fl ow. Low water fl ow when switched
to spa mode. Unit is plumbed backwards. Heat
exchanger clogged with debris. Internal bypass
valve damaged or clogged with debris.
Clean entire fi ltering system and or replace fi lter element.
Inspect & clean pump impeller. Adjust all plumbing valves.
Repair suction air leaks, grease pump lid O-ring. Replace
fi lter. Wrong fi lter pump pipe size. Automatic pool vacuum
causing restriction. Call your dealer or factory for advice if
above does not solve the problem.
8. Unit overcharged.
Reclaim charge. Recharge with appropriate nameplate
charge.
LOW REFRIG Alarm: Refrigerant low
pressure switch is open.
1. Low refrigerant in system.
Find source of refrigerant leak and fi x. 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 fi lter dryer
and charge appropriately.
FIVE ALARMS: Indicates 5 faults have
occurred in 1 hour. This fault will automati-
cally 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 fi ve
alarms in one hour.