Trouble Shooting (Continued) - Viessmann FS0900SE Betriebsanleitung

14.3 Trouble shooting (continued)

Problem
Alarm light is flashing
Error Code F1 in display
Alarm light is flashing
Error Code F2 in display
Alarm light is flashing
Error Code F3 in display
Alarm light is flashing
Error Code F4 in display
Alarm light is flashing
Error Code F5 in display
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Page No. 5237378-04 GB
Cause
Short circuit in temperature sensor.
Temperature sensor broken,
coldroom temperature >50°.
High pressure Pressostat activated.
Coldroom standard temperature has
been exceeded or is too low.
Door contact switch is not connected.
Coldroom door has been open for
more than four minutes.
Remedy
Replace temperature sensor.
Replace temperature sensor.
Check condensor for contamination and clean if
necessary. Check to see if condensing ventilator
is running. Reduce ambient temperature.
The display remains on, but can be deleted pressing a
button.
Check evaporator for contamination and clean if
necessary. Check evaporator for icing and initiate
manual defrosting if required. Check if evaporator
ventilator is running. By pressing the increase or
decrease button, coldroom temperature will be
shown again. If the temperature deviation is still
too high after one hour, the error code will be
shown again.
Put sliding switch on the control panel into the
position without door contact switch. Close door.
14.3
GB
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