V5 X VRF 50/60Hz
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Part 5 - Diagnosis and Troubleshooting
Table 5-4.1: Specific error codes for error xH4
Inverter module protection
DC bus low voltage protection
DC bus high voltage protection
Compressor frequency variation greater than 15Hz within one second protection
Actual compressor frequency differs from target frequency by more than 15Hz protection
Notes:
1. 'x' is a placeholder for the compressor system (compressor and related electrical components), with 1 representing compressor system A and
2 representing compressor system B.
The specific error codes xL0, xL1, xL2 and xL4 can also be obtained from the inverter module LED indicators. If an inverter
module error has occurred, LED5/7 is continuously on and LED4/6 flashes. Refer to Figure 5-4.4 and Table 5-4.2.
Figure 5-4.4: LED indicators LED4 to LED7 on main PCB
Table 5-4.2: Errors indicated on LED4/6
Flashes 8 times and stops for 1 second, then repeats
xL0 - Inverter module protection
Flashes 9 times and stops for 1 second, then repeats
xL1 - DC bus low voltage protection
Flashes 10 times and stops for 1 second, then repeats
xL2 - DC bus high voltage protection
Flashes 12 times and stops for 1 second, then repeats
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