This error code is probably proceeded by the warning code: “heatexchanger fan - voltage low”. The same troubleshooting tablecan be applied to.
Situation
Solution
Malfunction SMPS module. All other fans also report voltagelow error.
Replace the SMPS module.
Damaged insulation of the wire unit (reference C ) of the fan of the heat exchanger.
Check the insulation of the wire unit of the fan above the heatexchanger.
Repair the insulation of the wire unit using shrink sleeve.
If not repairable, replace the whole wire unit and/or fan.
Wire unit of the fans and motor units (reference W ) disconnected from the Power Backplane.
Remove the Input & Communication unit and check if the wireunit is inserted in the Power Backplane.
Malfunction Fan & Motor Control board.
Replace the Fan & Motor Control board.
Malfunction Power Backplane (bad connection)
Replace the Power Backplane.
Fan forthe heat exchanger.
Wire unitof the fan.
