Alarm list
VPL unit
Alarm list
The list below relates to Comfort units, and the events are divided into the following categories:
Warning
Operation continues, but something no longer functions optimally.
Critical
Operation has stopped partially or completely as a serious error requires
immediate attention.
ID
Type
Display text
Description / cause
Rectification of error
01
Hardware error
Error in the hardware of the control
system.
If resetting does not help, contact
service.
02
Alarm timeout
A warning alarm has become a critical
alarm.
Register alarm and reset.
If the alarm persists, contact service.
03
Fire alarm activated
The unit has stopped because the fire
thermostat has been activated.
If there has been no fire, contact service.
04
Pressure switch
The high-pressure switch in the
refrigeration circuit has been triggered,
possibly due to:
• Extremely warm outdoor air supply
• Clogged filter
• Defective fan
Check for faults and reset the alarm
Contact service if you cannot reset the
alarm or if alarms often occur.
06
Error in de-icing the
heat pump
The de-icing time has been exceeded.
The exchanger or the heat pump has
failed to de-ice within the maximum
time.
This may be due to the unit being
exposed to very low outdoor
temperatures.
Contact service if resetting the alarm
does not help.
Register the current operating
temperatures from the “Show data”
menu in order to ease the service
process.
8
Frost thermostat
triggered
Temperature sensors:
Only on units with a T9 sensor: Frost
thermostat in water heating element
triggered.
Check for adequate insulation around
the water heating element and its
connections.
Reset alarm.
7
Frost in after-heating
element
Temperature sensors:
Units without a T9 sensor: Frost
thermostat in water heating element
triggered.
Units with a T9 sensor: Water heating
element could not reach 20°C within 6
min.
Check for adequate insulation around
the water heating element and its
connections.
Reset alarm.
10
Over temperature
Electrical after-heating
The electrical heating element has
overheated.
A lack of airflow may be due to clogged
filters, a blocked air intake or a defective
supply air fan.
Check that air flows into the dwelling.
Check filters and the air intake.
Reset alarm.
If the above does not resolve the issue,
contact service.
11
Low flow over
the electrical heating
element
Lack of airflow in the supply air.
See alarm code 10.
See alarm code 10.
VPL28 (English)
BY NILAN
35
