38MHRC: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
29
PCB DIAGRAMS (CONT)
A210491
Fig. 34 —Sizes 18-24K (208/230V)
NOTE: After powering the unit on, LED3(Green color) and LED2(Red color) flashes if the unit experiences an issue.
Table 12 — LED Codes
O (light) X (off) (flash)
No. Problems LED3 (Green) LED2 (Red) IU display
1 standby for normal O X
2 Operation normally X O
3 IPM malfunction or IGBT over-strong current protection
X P0
4 Over voltage or too low voltage protection O O P1
5 EEPROM parameter error O
E5
6 Inverter compressor drive error X
P4
7 Inverter compressor drive error
O P4
8 Inverter compressor drive error
P4
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