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Troubleshooting
Diagnosing a Problem
In the event of a problem, always troubleshoot the unit according to:
Warning code displayed on the control unit.
A warning code is advisory and will not immediately stop the function of the unit.
Fault code displayed on the Control Unit.
Fault LED if connected.
If no indications are displayed, then troubleshoot problem according to the fault symptom as described in
the following tables.
Service/Fault Code Screens
The Fault Code notification is displayed, when a
fault has occurred. Take note of the fault code
when reporting a fault.
For assistance contact the service provider and quote the fault code number and the product serial
number which can be found behind the front cover.
Note that the fault code is not displayed until the fault has been present for 3 minutes.
The following fault codes numbers may be displayed.
Code numbers are added together if more than one fault is detected.
For example: Code 03 indicates that both left and right fans are not running.
Code
01
02
04
08
16
32
64
128
Table 4: Fault Codes
MVHR Installation and User Guide 476930
Problem
Left Fan Fault
Right fan Fault
Left Thermistor Fault
Right Thermistor Fault
Left Centre Thermistor Fault
Right Centre Thermistor Fault
Left Centre Temp/Humidity Sensor Fault
Right Centre Temp/Humidity Sensor Fault
Troubleshooting
17
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