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OTHERS
Error code
Operation and error status can be checked by LED of FCU KIT.
Error code R-LED Y/G-LED Error Solutions
162
ON OFF EEPROM error Change EEPROM
163
OFF ON Option input error Reset option
Communication error
ON ON
Communication error
(between interface modules
or wired remote controller)
Check communication
status between FCU KIT and
interface module or wired
remote controller
-
OFF OFF Power not supplied Check power supply
-
Blinking Blinking Normal
Error code Error description
E121 Indoor temperature sensor error (Open/Short)
E990 Water-IN 1 sensor error (Open/Short)
E991 Water-IN 2 sensor error (Open/Short)
E101
Communication error between indoor and outdoor unit when there is no
communication for 2 minutes
E201
Communication error on interface module detection
-
Incomplete interface module tracking in 10 minutes
-
Mixed installation of FCU KIT and indoor unit
-
Exceeding maximum installation number of FCU KIT (16)
E108 Error on repeated communication address
E109 Uncomplete setting communication address
E992 Sensor detached or water blocked in Cool mode
E993 Sensor detached or water blocked in Heat mode
E198 Thermal fuse open error
E162 EEPROM error
E163 EEPROM option error
LED
Troubleshooting
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