32
Calling up fault messages
"Vitovent 300-W" operating instructions
Fault messages
Characteristics of the mechanical ventilation sys-
tem
Action
"E100"
: Pressure sensor in the supply air fan faulty, pressure hoses (red) blocked or kinked
■
Ventilation with a constant fan speed
■
If the outdoor air temperature is < 0 °C the integral
preheater coil switches on.
■
Check the pressure hoses (red) for contamina-
tion, kinks and damage (see page 34).
■
Check the pressure sensor in the supply air fan
and replace if required.
"E101"
: Pressure sensor in the extract air fan faulty, pressure hoses (blue) blocked or kinked
■
Ventilation with a constant fan speed
■
If the outdoor air temperature is < 0 °C the integral
preheater coil switches on.
■
Check the pressure hoses (blue) for contamina-
tion, kinks and damage (see page 34).
■
Check the pressure sensor in the extract air fan
and replace if required.
"E103"
: Bypass damper motor faulty
■
Bypass damper does not open or close.
■
Check electrical connections on the bypass
damper motor and replace motor if required.
"E104"
: Extract air fan faulty
■
Both fans stop.
■
The preheater coil is switched off.
■
Check electrical connections on the extract air
fan and replace extract air fan if required.
"E105"
: Supply air fan faulty
■
Both fans stop.
■
The preheater coil is switched off.
■
Check the electrical connections on the supply
air fan and replace supply air fan if required.
"E106"
: Short circuit/lead break, outdoor air temperature sensor
■
Both fans stop.
■
The preheater coil is switched off.
■
Bypass damper is closed.
■
Check resistance value (NTC 10 k
Ω
, see
page 42) at terminal X7.1/X7.2 on the control-
ler PCB and replace sensor if required.
"E107"
: Short circuit/lead break, extract air temperature sensor
■
Bypass damper is closed.
■
Check resistance value (NTC 10 k
Ω
, see
page 37) at terminal X17.1/X17.2 on the con-
troller PCB and replace sensor if required.
"E108"
: Short circuit/lead break, external temperature sensor (geothermal heat exchanger)
■
External electric preheater coil is not switched on.
or
■
3-way diverter valve for geothermal heat exchanger
(on-site provision) is not switched.
■
Check resistance value (NTC 10 k
Ω
, see
page 37) at terminal X15.7/X15.8 on the con-
troller PCB. Replace sensor if required.
"E999"
: DIP switch on the controller PCB incorrectly set or incorrect controller PCB fitted
■
The ventilation unit will not start.
■
Check DIP switch settings and replace control-
ler PCB if required (see page 42).
Troubleshooting
Diagnosis at the remote control
5793 605 GB
Diagnosis
