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Troubleshooting
Introduction
Errors are indicated by an LED located under the filter
If the LED slowly flashes orange, it means you need to replace the air filters.
See page 10
LED displays
If this LED is red it indicates an operating error. The red LED can indicate three different
Software <2.0
errors:
Flashing slowly
Flashing rapidly
Lights constantly
LED displays
If the LED flashes RED then there is an operating error. The length of the flash corre-
Software ≧2.0
sponds to an error code with corresponding digits in the left column of the table below,
followed by a 5 second break.
Number of
LED Red
Error on the bypass damper
Error on the internal temperature sensor T3/T4
Error on the fan
Supply temperature is <+5°C
External fire alarm is activated
One of the internal temperature sensors is measuring >70°C
T1/T2 Temperature sensor is defective
Error number
flashes
Control panel
1
E 1
2
E 2
3
E 3
4
E 4
5
E 5
6
E 6
7
E 7
8
E 8
9
E 9
10
E 10
11
E 11
12
E 12
13
E 13
14
E 14
15
E 15
reset
Description
Exhaust fan
Supply fan
Bypass damper
Outside air temperature sensor (T1)
Supply air temperature sensor (T2)
Extracted air temperature sensor (T3)
Exhaust air temperature sensor (T4)
Indoor air temperature sensor (T5)
Humidity sensor, RH% (optional extra)
Outside temperature < -13°C
Supply air temperature < +5°C
Fire alarm, one or more of the internal sensors is
measuring a temperature over 70°C.
Communication error / poor signal
Fire alarm, thermostat in the duct system. (Optional
extra)
High water level
button.
Error
Continued overleaf
35
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