Non-Unit Related Faults - mundoclima MUC-W9 Serie Manual De Instalación Y Usuario

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
Protection
6
warning line
Model protection not set
Protection (model DIP switch not
7
listed in the model table)
Water temperature
8 Protection
protection
Anti-freezing protection
Protection
9
10
Protection Remote shutdown
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.
Running Indicator
Steady on
Steady on
Steady on
Steady on
Steady on
exceeding
Blinking
Blinking
Blinking
Blinking
Blinking
45
Fault Indicator Buzzer action
Flashes once Buzzes 2 times
every 3 seconds every 3 seconds
Flashes 2 times Buzzes 2 times
every 3 seconds every 3 seconds
Flashes 3 times Buzzes 2 times
every 3 seconds
every 3 seconds
Flashes 3 times Buzzes 2 times
every 3 seconds
every 3 seconds
Flashes 4 times Buzzes 2 times
every 3 seconds
every 3 seconds
Buzzes 2 times
Flashes once
every 3 seconds
every 3 seconds
Buzzes 2 times
Flashes 2 times
every 3 seconds every 3 seconds
Buzzes 2 times
Flashes 3 times
every 3 seconds
every 3 seconds
Flashes 4 times Buzzes 2 times
every 3 seconds
every 3 seconds
Flashes 5 times Buzzes 2 times
every 3 seconds every 3 seconds
Error Code
E7
E2
E3
E4
E8
EE
PH
P1
P0
P2