10 Troubleshooting
Troubleshooting procedure
SMGB0091 rev.2 - 11/2015
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10
Alarm code
EE
Compressor protection
This alarm code is displayed when one of the following alarms occurs three times within six hours. If the RASC unit
operates continuously without removing the cause of the alarm, the compressor may be seriously damaged
Alarm code
Content of abnormality
02
Tripping of protection device in RASC unit
07
Decrease in discharge gas superheat
08
Increase in discharge gas temperature
45
Activation of high pressure increase protection device
47
Low pressure decrease protection activating
You can check these alarms using the check mode 1. Follow the action that is indicated in each alarm chart. You can
clear these alarms only by turning OFF the main switch to the system.
However, pay careful attention before starting,
because there is a possibility of causing serious damages to the compressors.
Alarm code
b0
Incorrect setting of unit model code
This alarm code is indicated in the following condition. Check the unit model code setting (DSW4) of indoor unit PCB
after turning OFF the power source.
Condition
Action
The unit model code setting (DSW4) is not set (all pins are
“OFF”), or is set for the incorrect indoor unit type.
Set DSW4 correctly.