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Refer to Maintenance Manual for troubleshooting.
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 nd the information on the nameplate of this unit).
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 qualied 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
NO. Error Name Running Indicator Fault Indicator Buzzer action Error Code
1 Error E2PROM communication
error Steady on Flashes once every
3 seconds
Buzzes 2 times
every 3 seconds E7
2 Error Room temperature sensor
port abnormal Steady on Flashes 2 times
every 3 seconds
Buzzes 2 times
every 3 seconds E2
3 Error Coil sensor (T2C) port
abnormal Steady on Flashes 3 times
every 3 seconds
Buzzes 2 times
every 3 seconds E3
4 Error Coil sensor (T2C) port
abnormal Steady on Flashes 3 times
every 3 seconds
Buzzes 2 times
every 3 seconds E4
5 Error DC motor stall fault Steady on Flashes 4 times
every 3 seconds
Buzzes 2 times
every 3 seconds E8
6 Protection Water level exceeding
warning line Blinking Flashes once every
3 seconds
Buzzes 2 times
every 3 seconds EE
7 Protection
Model protection not set
(model DIP switch not listed
in the model table)
Blinking Flashes 2 times
every 3 seconds
Buzzes 2 times
every 3 seconds PH
8 Protection Water temperature
protection Blinking Flashes 3 times
every 3 seconds
Buzzes 2 times
every 3 seconds P1
9 Protection Anti-freezing protection Blinking Flashes 4 times
every 3 seconds
Buzzes 2 times
every 3 seconds P0
10 Protection Remote shutdown Blinking Flashes 5 times
every 3 seconds
Buzzes 2 times
every 3 seconds P2
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