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C. Unplug Condensation Drain Holes - The heat pump extracts humidity from the air as it
passes through the coil, similar to the way a cold drink outside “sweats” on a hot day. This con-
densation drains from the bottom of the unit.
1. Routinely check to be sure the condensation drain holes in the base of the unit are not plugged
with dirt or debris.
2. If condensation becomes a problem, optional drain pans are available from your heat pump
distributor or pool dealer.
IX. Troubleshooting
If your heat pump does not operate, or simply does not heat your pool water, the indicator lamps
on the front control panel (see Section IV) can provide valuable clues as to what is wrong, and
may even indicate precisely what the problem is. Always observe these lamps before calling a
service representative. By reporting on the telephone which lamps are ON and OFF, the service
rep may be able to solve the problem without the expense of a service call.
A. UNIT IS RUNNING, BUT NOT HEATING
• Is water flow through the unit adequate? Check the unit for obstructions, such as a clogged
filter pump strainer, a dirty filter, or valves not positioned correctly.
• Is the ejected air from the unit 8-10° cooler than incoming air? If so, the unit is extracting
heat from the air and transferring it to the pool.
• Is water condensing on the evaporator and internal copper pipes? This is also evidence of
heat removal from the air. When the air is cool with low humidity, condensation may not be
evident.
• How long has the unit been operating? During initial pool heating in cold weather, it may
require a week to elevate the water temperature to a comfortable level. Normally, it takes
about 4 days.
How many hours per day is the unit operating? Remember that the heat pump only
operates while the pool pump is running. Set the time clock to permit 24 hour per day
operation. After the desired temperature is reached, return the unit to normal operation
of 8-10 hours per day.
NOTE: If the pool pump and heat pump shut OFF before the water temperature is
raised to the desired level, you must lengthen the running time of both. To do this,
reset the time clock dial for the longer running time, or manually operate the pump
with the timer override switch. Since the heat pump capacity and efficiency are both
greater at higher ambient air temperatures, run time should be set to take
advantage of all daylight hours, when the air is generally warmer.
• Is airflow through the unit being obstructed? Restrictions such as shrubbery, tall grass, dirty
coils, or any other obstruction to airflow will reduce performance.
• Is the pool blanket/cover being used? Unblanketed pools can lose up to 10 degrees per night
compared to 4 degrees or fewer when a blanket is used. Without a blanket, the total heat
gained during the day can be lost overnight.
• Are rapid heat losses occurring in some other way, such as high wind, spillage, rainfall, flow
through solar panels at nights, or a high water table?