Johnson MISTRAL Series User Manual

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 find the information on the nameplate of this unit).
NO.
1
2
Error
Error
Error
Name Running Indicator
Steady on
Steady on
Fault Indicator Buzzer action Error Code
E7
E2
E
2
PROM communication
error
Room temperature sensor
port abnormal
Water level exceeding
warning line
Anti-freezing protection
Flashes once
every 3 seconds
Flashes 2 times
every 3 seconds
Flashes 2 times
every 3 seconds
Flashes 3 times
every 3 seconds
Flashes 4 times
every 3 seconds
Flashes 5 times
every 3 seconds
Buzzes 2 times
every 3 seconds
Buzzes 2 times
every 3 seconds
Error
Protection
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
6.2 Non-Unit Related Faults
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
17
Error5
Flashes 4 times
every 3 seconds
Buzzes 2 times
every 3 seconds
E8
DC motor stall fault Steady on
Coil sensor (T2C) port
abnormal
Steady on
Flashes 3 times
every 3 seconds
Buzzes 2 times
every 3 seconds
E4
Coil sensor (T2C) port
abnormal
Error
Steady on
Flashes 3 times
every 3 seconds
Buzzes 2 times
every 3 seconds
E3
3
4
Protection
6
Blinking
Flashes once
every 3 seconds
Buzzes 2 times
every 3 seconds
EE
7
Protection
Buzzes 2 times
every 3 seconds
Model protection not set
(model DIP switch not
listed in the model table)
Blinking
PH
Protection
8
Water temperature
protection
Blinking
Buzzes 2 times
every 3 seconds
P1
Blinking
Buzzes 2 times
every 3 seconds
P0
P2BlinkingRemote shutdown
Protection
9
10
Buzzes 2 times
every 3 seconds
V.1

Johnson MISTRAL Series Specifications

General

Brand	Johnson
Model	MISTRAL Series
Category	Fan
Language	English