Mitsubishi Electric M Series Manual page 543

M series
C.4.7 TROUBLESHOOTING
C.4.7.1 MXZ Series
MXZ-2B30VA MXZ-2B40VA MXZ-2B52VA MXZ-3B54VA MXZ-3B68VA
MXZ-4B71VA MXZ-4B80VA MXZ-5B100VA MXZ-8A140VA
Failure mode recall function
This air conditioner can memorize the abnormal condition which has occurred once.
Even though LED indication listed on the troubleshooting check table disappears, the memorized failure details
can be recalled.
This mode is very useful when the unit needs to be repaired for the abnormality which does not recur.
1. Type of failure mode recall function
There are 2 types in failure mode recall function as shown below.
1 Indoor and outdoor unit failure mode recall function
With this function, failure mode of indoor unit and a part of failure mode of outdoor unit can be recalled.
2 The details of outdoor unit failure mode recall function
With this function, more detailed failure mode of outdoor unit can be recalled.
Refer to the service manual of indoor unit for how to recall the failure mode and the details of indoor unit failure mode.
The outdoor unit failure mode is indicated by the operation indicator lamp on the indoor unit and the LED of outdoor unit.
See "Failure mode table".
MULTI SYSTEM Inverter Heat Pump
C-541