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ESI Outdoor Unit Installation Instruction
05.2018
Manufacturer reserves the right to change at any time for specifications or designs without notice and incurring obligations.
Compressor INV module
protection
or
1.Error definition:
C0: Critical OV Fault-COVP
C1: DC bus over-voltage protection-OVP
C2: DC bus under-voltage protection-LVP
C3: Over current protection-OCP
C4: ZeroSqdFlt
C5: Synchronization - PwmsyncErr
C6: Phase loss protection for 3-phase lines U, V, W in compressor-PhslossFlt
C7: Compressor speed inconsistent fault
C8: Compressor speed instability
C9: Compressor speed difference between given transient variation and actual operation
E0: System locks up when C0~C8 has occurred six times in 60 minutes.
2.Possible causes:
Abnormal power supply voltage
Vdc increases due to storm or hurricane
Dirty compressor terminal
Damaged main control board
Damaged compressor
Display
~
YES
NO
The power supply voltage is not in the range of 175~ 280VAC.
Contact agency supplying power
to verify that they are sending the
correct voltage.
Is the fan speed more than 200RPM on standby condition?
NO
YES
Waiting for wind decrease
Is the compressor open-circuited?
NO
YES
Replace the compressor
Are there any dirty things on the compressor terminal?
YES
Clean the terminal
Normal
NO
Are the compressor wirings (U/V/W) securely connected?
YES
NO
Reconnect the wiring
Turn off the power supply to replace the main control board.
Restart the unit, is the error code disappears?
NO
YES
Replace the compressor