Fujitsu WATERSTAGE WOYG160LJL Maintenance Document page 12

Clear 4: Heat pump capacity signal error
Hydraulic Unit LED:
Outdoor Unit LED:
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
3. Replace interface PCB:
If check point 1 and 2 do not improve the symptom, replace Interface PCB.
- 12 -
Green 4 fl ashes / Red 1 fl ash
22 fl ashes
OK
OK
Waterstage / Maintenance Manual / 2105 - EN