UNITED C5 Series, Инструкция по установке и обслуживанию

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Troubleshooting
17
Troubleshooting the Heating Circuit
If the heater is non-operational or the unit is not heating properly, re-check
that the code settings have been programmed correctly for the hot tub’s
heating con
fi guration. If programmed correctly, the heating circuit should
be tested.
Testing the Heating Element
To test the heating element, you must fi rst make sure the topside is calling
for heat (The display should be fl ashing the heat message - HEt). Then
place one probe of your voltmeter/multi-meter on Testing Point 11 (Heater
Line-1), and the other on Testing Point 9 (Heater Line-2). You should get a
voltage reading equal to the control box’s incoming power voltage (240VAC
or 120VAC). If that is the case, but the water is not getting heated, then the
heating element has failed/burnt-out/dry-
fi red.
If the voltage reading was not equal to the incoming power voltage, then
proceed with checking the heater relays.
Testing the Heating Relays
Place one probe of your voltmeter/multi-meter on Line-1 (Test Point 1), and
the other on Test Point 9 (Heater Line-2). You should get a voltage reading
equal to the control box’s incoming power voltage (240VAC or 120VAC). If
that is the case, proceed to the next test. If you read no voltage, however,
then the K10 relay has failed.
If the K10 relay checks out, place one probe of your voltmeter/multi-meter
on Line 2 (Test Point 2) and the other on Test Point 10 (T18/Gas Terminal).
You should get a voltage reading equal to the control box’s incoming power
voltage (240VAC or 120VAC). If that is the case, proceed to the next test. If
you read no voltage, however, then the K1 relay has failed.
If the K1 relay checks out, place one probe of your voltmeter/multi-meter
on Line 2 (Test Point 2) and the other on Test Point 11 (Heater Line-1). You
should get a voltage reading equal to the control box’s incoming power
voltage (240VAC or 120VAC). If you read no voltage, then the K9 relay
has failed.