56
Table 6-1.1: Error code table (continued)
Error
code
1
Content Remarks
Manual re-start
required
2
xPL Inverter module temperature protection Displayed on the unit with the error No
PP Compressor discharge insufficient superheat protection Displayed on the unit with the error No
xL0 Inverter module protection Displayed on the unit with the error Yes
xL1 DC bus low voltage protection Displayed on the unit with the error Yes
xL2 DC bus high voltage protection Displayed on the unit with the error Yes
xL4 MCE error Displayed on the unit with the error Yes
xL5 Zero speed protection Displayed on the unit with the error Yes
xL7 Phase sequence error Displayed on the unit with the error Yes
xL8
Compressor frequency variation greater than 15Hz within one
second protection
Displayed on the unit with the error Yes
xL9
Actual compressor frequency differs from target frequency by
more than 15Hz protection
Displayed on the unit with the error Yes
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. 'y' is a placeholder for the address (1 or 2) of the slave unit with the error.
2. For some error codes, a manual restart is required before the system can resume operation.
3. Once the EXV has been connected properly, the error code will flash to indicate that the connection has been re-established. A manual restart is then
required before the system can resume operation.
2 Troubleshooting
2.1 Warning
All electrical work
must be carried out by competent and suitably qualified, certified and
accredited professionals and in accordance with all applicable legislation (all national, local and other laws,
standards, codes, rules, regulations and other legislation that apply in a given situation).
Power-off the outdoor units before connecting or disconnecting any connections or wiring, otherwise electric
shock (which can cause physical injury or death) may occur or damage to components may occur.
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