Hayward HeatPro® Heat Pro All Models - Page 37

Unit is running but not heating, Unit runs continuously, Unit is cycling, Unit is noisy

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Unit is running but not heating: • Is the fan turning? • Is the air coming out of the top cooler than ambient air temperature? • Check the thermostat. Make sure it is turned up high enough. If the heat pump does not appear to be heating because it is not detectable to the touch, remember the difference at any given flow rate may be only a degree or two. A quick and simple way to see if the unit is actually heating, is to check the air temperature (ambient air) being drawn into the unit and compare it to the air being blown out of the top. If the air coming in is 70° F and the air coming out is 65° F, there is a 5° F difference - which is going into the water. If the two temperatures are the same, there may be a problem and you should contact the manufacturer. Unit runs continuously: • First, turn off the thermostat. If the unit turns off, the thermostat was set too high. • Second, if the unit is still running after you turn off the thermostat, turn off the filter pump. If the unit is still running after approximately 2 minutes, disconnect power. The main contactor may have failed or the water switch may have failed. • To check to the water pressure switch, make sure that power is disconnected from the heat pump. Turn on the filter pump and check across the wire terminals of the water pressure switch with an Ohmmeter. If the ohmmeter indicates an open circuit, try adjusting the knob on the switch. If it "closes", leave the knob at this setting and re-check the heat pump operation. Unit is cycling: • Is the water flow rate within acceptable ranges? (See section Flowrate.) Check the filters and the valves to ensure they are clean and fully open. The water pressure switch may have to be adjusted (see section Installation of Heater Below Pool Surface.) • Check the evaporator coil for severe frost. • If the unit continues to cycle, turn power off to the heat pump to keep the cycling from effecting the compressor. Unit is noisy: • If the heat pump seems noisy at start-up and then returns to normal sound levels, this is not cause for concern. Such noise may occur when the unit has been off for a longer-than-normal period of time. 36

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36
Unit is running but not heating:
•
Is the fan turning?
•
Is the air coming out of the top cooler than ambient air temperature?
•
Check the thermostat.
Make sure it is turned up high enough.
If the heat pump does not appear to be heating because it is not detectable to the touch,
remember the difference at any given flow rate may be only a degree or two.
A quick and simple
way to see if the unit is actually heating, is to check the air temperature (ambient air) being
drawn into the unit and compare it to the air being blown out of the top.
If the air coming in is
70
°
F and the air coming out is 65
°
F, there is a 5
°
F difference – which is going into the water.
If the two temperatures are the same, there may be a problem and you should contact the
manufacturer.
Unit runs continuously:
•
First, turn off the thermostat.
If the unit turns off, the thermostat was set too high.
•
Second, if the unit is still running after you turn off the thermostat, turn off the filter pump.
If
the unit is still running after approximately 2 minutes, disconnect power. The main contactor
may have failed or the water switch may have failed.
•
To check to the water pressure switch, make sure that power is disconnected from the heat pump.
Turn on the filter pump and check across the wire terminals of the water pressure switch with an
Ohmmeter. If the ohmmeter indicates an open circuit, try adjusting the knob on the switch. If it
“closes”, leave the knob at this setting and re-check the heat pump operation.
Unit is cycling:
•
Is the water flow rate within acceptable ranges? (See section
Flowrate.
)
Check the filters and
the valves to ensure they are clean and fully open. The water pressure switch may have to be
adjusted (see section
Installation of Heater Below Pool Surface.
)
•
Check the evaporator coil for severe frost.
•
If the unit continues to cycle, turn power off to the heat pump to keep the cycling from effecting
the compressor.
Unit is noisy:
•
If the heat pump seems noisy at start-up and then returns to normal sound levels, this is not cause
for concern.
Such noise may occur when the unit has been off for a longer-than-normal period of
time.