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Split system (Single phase and 3-phase type)
Maintenance Document
1544-1
11
Clear 4: Heat pump capacity signal error
Hydraulic Unit LED: Green 4 flashes / Red 1 flash
Outdoor Unit LED: 22 flashes
Probable causes:
Misconnection.
Sensor
failure.
Interface PCB failure.
Check:
1. Check connection interface PCB and Heat pump regulator PCB:
-
See if the connector has been disconnected.
-
See if the connection is correct.
-
Check for any damage on the sensor cable.
After solving the misconnection problem, switch the heat pump back on.
2. Check resistance value:
3 pin of CN22 – M < 10
Ω
OK
3. Replace interface PCB:
If check point 1 and 2 do not improve the symptom, replace Interface PCB.
OK
Содержание Waterstage WO G112LCT Series
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