E3, E7 Or E8 Outdoor Coil Temperature Sensor, Ambient Temperature Sensor Ordischarge Temperature Sensor Failure - Friedrich Chill Premier Inverter Series Service Manual

3.2.4 E3, E7 or E8----ODU Coil temperature sensor, Ambient temperature sensor or
E3, E7 or E8 Outdoor Coil temperature sensor, Ambient temperature sensor orDischarge temperature sensor Discharge temperature sensor failure.
failure.
If any sensor resistance is open or shorted, unit will display failure code as E3/E7 or E8, Main
PCB and Display PCB turn off. When the sensor resistance recovers, the unit reverts to standby,
customer can switch on the unit directly.
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TROUBLESHOOTING
Start
Display E3, E7 or E8
Is the sensor well
connected to Main PCB ?
Yes
Check the sensor
resistance. Open or
short circuit?
No
Replace Main PCB
End
No
Re connect
Problem solved ?
No
Yes
Replace sensor
Problem solved?
No
Yes
Yes