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Trouble shooting
■ Diagnosis and adjustment (Error Code)
▶ Fan coil unit related Error Code
Error mode
Cause
Explanation
1
E‑108
Error due to repeated address setting (When 2 or more devices have same address within the network)
2
E‑121
Indoor temperature sensor of fan coil unit (Open or Short)
3
E‑122
Eva in temperature sensor of fan coil unit (Open or Short)
4
E‑123
Eva out temperature sensor of fan coil unit (Open or Short)
5
E‑128
Water temperature increase prevention error (product will stop at high water temperatures of more than
65℃)
6
E‑153
Floating switch error of fan coil unit (during secondary detection)
7
E‑154
Fan coil unit Fan operation error
8
E‑161
Mixed operation mode error of fan coil unit; When outdoor unit is getting ready to operate in cooling (or
heating) and some of the fan coil units are trying to operate in heating (or cooling) mode
9
E‑162
EEPROM error of MICOM (physical problem of parts/circuit)
10
E‑163
Indoor unit option error (unentered option or incorrect entry)
11
E‑170
Error due to confused use of Fahrenheit and Celsius
12
E‑627
Error due to excessive number of cable remote control installations (2 installations)
13
E‑633
Error due to model installation mix‑up
14
E‑653
Short circuit or malfunction of temperature sensor inside remote control
15
E‑654
Remote control Data error (Memory Read/Write Error)
16
E‑702
Error due to closed EEV of fan coil unit (during primary detection)