Soleus Air KFHHP-22 service manual Rectifying bridge, reactor, capacitance etc. is ok

7.Module protection : Handling method:

Check if the voltage between power module P and N is too low and if the current is too high. In normal condition, voltage between P and N should be about 320V.

				Abnormal
Normal			Check power supply circuit of outdoor unit (if PTCresistance
			rectifying bridge, reactor, capacitance etc. is ok).
		Check if radiating paste is spread			Reinstall power module and
		evenly or radiating sticker is stuck			re-spread radiating paste or
Temperature of power module is too high,
		well; if screws of power module
which causes overheating protection					stick radiating sticker on the
		is tightened			radiator of power module.
	Protection is still displayed

Confirm the setting status of outdoor unit (cooling)

Normal

Poor radiation, heat exchanger is dirty

Remove obstructions and clean

Confirm if outdoor fan motor is running; unplug the

three connecting wires between U, V, W of compressor and power module. Turn on the unit to see if outdoor

fan runs normally (about 1 minute)

Outdoor fan runs

Confirm if there is voltage output and balance of voltage between any two phases of U, V and W.

Outdoor fan stops

Measure the voltage of outdoor fan connector

No voltage Normal voltage

Replacethemainboard	Replace the fan
of outdoor unit	motor

		Yes				No
	Whether module type				Replacethepowermodule
	is correct
Abnormal				Normal
Replace the module			Measure the three-phase
with correct type			resistance of compressor

Normal

Whether cylinder of compressor is stuck

Abnormal

Replace the compressor

If the unit runs normally after connected

with the new compressor for trial run, the cylinder of original compressor is stuck

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