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English
Appendix
Appendix
Troubleshooting
The following error indications appear on the fan coil unit display when a problem occurs.
Error detection and restart
• If an error occurs during operation, the display blinks to indicate an error and all operations except for the display
operation stop.
• When you restart the product using the remote control and the switch, a normal operation starts, and then the
detected error mode is determined.
Display indications at error detection
Condition of the fan coil unit
Error code
Fan coil unit display indications
Start / Stop
Defrost
Timer
Filter
cleaning
Short- or open-circuit error of the room
temperature sensor
E121
1. Short- or open-circuit error of the EVA IN sensor
E122
2. Short- or open-circuit error of the EVA OUT sensor
E123
Error of the fan
E154
1. Error that there is no communication between
FCU relays for 2 minutes
E101
2. Communication error received from the relay
E102
3. Error that relay tracking continued for 3 minutes
E202
4. Communication error that the actual number of
installed FCUs differs from the number detected
by tracking
E201
5. Error due to duplicated communication addresses
E108
6. Error that communication addresses are not yet
determined
E109
Communication errors other than the errors listed
above
Errors detected by the self-diagnosis
1. Error of water temperature rise prevention
※ The product stops at high water temperature
above 65 ℃.
E128
2. Thermal fuse open error
E198
Second detection of the float switch error
E153
EEPROM error
E162
EEPROM option error
E163
MDS (Motion Detecting Sensor) Error
: Blinking : Off
Appendix
DB68-11289A-01_IM_DVM FCU WindFree 4way_EU_EN_.indb 41
2022-04-26 오전 8:55:25