78
Table 4-4.1: Specific error codes for error xH4
Specific error code
1
Content
xL0
Inverter module protection
xL1
DC bus low voltage protection
xL2
DC bus high voltage protection
xL4
MCE error
xL5
Zero speed protection
xL7
Phase sequence error
xL8
Compressor frequency variation greater than 15Hz within one second protection
xL9
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, xL4, xL5 and xL7 can also be obtained from the inverter module LED
indicators. If an inverter module error has occurred, LED1 flashes. Refer to Figure 4-4.2 and Table 4-4.2.
Figure 4-4.2: LED indicators LED1 on main PCB
Table 4-4.2: Errors indicated on LED1
LED4/6 flashing pattern
Corresponding error
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 xL4 - MCE error
Flashes 13 times and stops for 1 second, then repeats xL5 - Zero speed protection
Flashes 15 times and stops for 1 second, then repeats xL7 - Phase sequence error
