Danfoss Heat Pump Troubleshooting Guide download pdf (Page 2)

VMIFB202

The incoming phases have the incorrect sequence (only applies to 3-phase heat pumps).

Action:

Reset the phases

When the compressor runs with the phases incorrectly sequenced a strange noise may be heard (loud, rattling).

If the compressor for some reason runs backwards it cannot raise the temperature.

When the compressor runs, check the discharge pipe temperature by feeling it with your hand.

The discharge pipe must be hot (not lukewarm) even slightly away from the compressor if the phases are in the correct sequence.

If the phases are in the incorrect order, switch two of the incoming phases to the heat pump.

with incoming phases option 1 or down at soft starter option 2.

And repeat the procedure by checking the discharge pipe temperature

Troubleshooting Guide Error phase sequence

Reset here

option 1 or

option 2 here

1 2 3 4 5 6 7 ... 33 34

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Danfoss Heat Pump Troubleshooting Guide Page 2