
4-16
4-17
Trouble shooting
■
Circular type cassette type
▶ LED lamp display during error detection
Abnormal operation
Error
code
LED display
Ice
blue
Yellow
green
Blue
Red
Power RESET (flickering every 2 seconds)
‑
◑
×
×
×
Indoor temperature Sensor Error (Open/short)
E121
×
×
×
◑
Eva‑In Sensor Error (Open/short)
Eva‑out Sensor Error (Open/short)
E122
E123
×
◑
×
◑
Indoor Fan Error
E154
×
×
◑
◑
Water temperature increase prevention error (product will stop at high
water temperatures of more than 65℃)
E128
Self‑diagnosis error
×
×
◑
×
If there is no communication between FCU
↔
repeater for 2 minutes
Communication Error received from repeater
Repeater Tracking 3 minute Error
Communication error after Tracking due to unmatching number of
installed units
Error due to duplicated communication address (NASA Only)
Communicated address unconfirmed (NASA Only)
Communication error excluding ones above
E101
E102
E202
E201
E108
E109
×
◑
×
×
Floating s/w secondary detection
E153
×
◑
◑
×
EEPROM ERROR
E162
◑
◑
×
◑
EEPROM OPTION ERROR
E163
Fan coil unit incompatibility Error
E164
◑
×
×
◑
Thermal Fuse Open Error
E198
◑
×
◑
×