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1) Error code overview
If a centralized controller is used, error codes appear on the user interface. Contact the installation personnel and inform them
of the error code, unit model and serial number (you can find the information on the nameplate of this unit).
NO.
Error
Name
E
PROM communication
2
1
Error
error
Room temperature sensor
2
Error
port abnormal
Coil sensor (T2C) port
3
Error
abnormal
Coil sensor (T2C) port
4
Error
abnormal
5
Error
DC motor stall fault
Water level exceeding
6
Protection
warning line
Model protection not set
7
Protection
(model DIP switch not listed
in the model table)
Water temperature
8
Protection
protection
9
Protection Anti-freezing protection
10
Remote shutdown
Protection
Refer to Maintenance Manual for troubleshooting.
6.2 Non-Unit Related Faults
The following fault symptoms are not caused by the unit itself:
1) Fault symptom: Fan speed is not consistent with the setting
The fan doesn't respond to the controller. In cooling mode, when the pipe water temperature is outside the allowable range of
room temperature, the fan speed will be maintained at a low level to avoid direct exposure to hot air. In heating mode, when
the pipe water temperature reaches a certain low level, the fan speed will also be maintained at a low level to avoid direct
exposure to cold air.
2) Fault symptom: Fan direction is not consistent with the setting
The fan direction is inconsistent with the direction indicated on the user interface. Swing is a customized function. If the
customer customizes this function and the fan direction does not correspond to the set direction, this is because the unit is
controlled
3) Fault symptom: white fog from a certain unit
This may result from high humidity during cooling mode. If the interior pollution of the fan coil unit is severe, the indoor
temperature distribution may be uneven. At this time, you need to clean the inside of the unit. Ask the dealer for information on
how to clean the unit. This operation must be carried out by qualified maintenance personnel.
4) Fault symptom: dust and dirt in the unit
This may happen after the unit is used again after being left idle for a long period. This is because there is dust inside the unit. 5)
Fault symptom: odour from unit
This unit will absorb the odours of rooms, furniture, cigarettes and others, and then disperse the odours again. Odour might
occur after small animals enter the unit.
6.3 Product Data
Running Indicator
Fault Indicator
Flashes once every
Steady on
3 seconds
Flashes 2 times
Steady on
every 3 seconds
Flashes 3 times
Steady on
every 3 seconds
Flashes 3 times
Steady on
every 3 seconds
Flashes 4 times
Steady on
every 3 seconds
Flashes once every
Blinking
3 seconds
Flashes 2 times
Blinking
every 3 seconds
Flashes 3 times
Blinking
every 3 seconds
Flashes 4 times
Blinking
every 3 seconds
Flashes 5 times
Blinking
every 3 seconds
17
Buzzer action
Error Code
Buzzes 2 times
E7
every 3 seconds
Buzzes 2 times
E2
every 3 seconds
Buzzes 2 times
E3
every 3 seconds
Buzzes 2 times
E4
every 3 seconds
Buzzes 2 times
E8
every 3 seconds
Buzzes 2 times
EE
every 3 seconds
Buzzes 2 times
PH
every 3 seconds
Buzzes 2 times
P1
every 3 seconds
Buzzes 2 times
P0
every 3 seconds
Buzzes 2 times
P2
every 3 seconds
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