innovair Inverter FLEX24 DEV24H2R18, Service Manual

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SERVICE MANUAL
43
3.4.15 “P0” Driver Reset Protection
Error display: ODU mainboard LED displayer
Error judgment condition and method:
Drive board chip resets and starts initialization. After the drive board is energized for 5s, it detects that the
chip resets again. In this case, it can be judged as drive chip reset protection.
Possible reason:
3.3V drive chip supply voltage drop.
TRST lead of JTAG programming is interrupted.
Troubleshooting ：
P0
Driver reset protection
3.3V drive board
voltage is normal or
not?
Replace the drive board
Re-arrange the wires. Heavy
current wires s hould avoid
the drive board chip.
NO
YES
3.4.16 “P5” Over-Current Protection
Error display: ODU mainboard LED displayer
Error judgment condition and method:
If compressor’s instant current value is higher than the set current protection value, then it can be judged that
compressor over-current occurs and system will shut down for protection.
Possible reason:
System load is too much and compressor current is too large.
Compressor 3-phase wire connection is lack of phase or phase-reversed.
Compressor phase wire is loose or has bad contact.