Alarm list
VPL unit
Alarm list
T
he 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
i
mmediate attention.
ID Type Display text Description / cause Rectification of error
01 Hardware error
Error in the hardware of the control
s
ystem.
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
t
hermostat has been activated.
If there has been no fire, contact service.
04
Pressure switch
The high-pressure switch in the
r
efrigeration circuit has been triggered,
possibly due to:
• Extremely warm outdoor air supply
• Clogged filter
• Defective fan
Check for faults and reset the alarm
C
ontact service if you cannot reset the
alarm or if alarms often occur.
06
Error in de-icing the
h
eat pump
The de-icing time has been exceeded.
T
he 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
d
oes not help.
Register the current operating
temperatures from the “Show data”
menu in order to ease the service
process.
8
Frost thermostat
t
riggered
Temperature sensors:
O
nly on units with a T9 sensor: Frost
thermostat in water heating element
triggered.
Check for adequate insulation around
t
he water heating element and its
connections.
Reset alarm.
7
Frost in after-heating
e
lement
Temperature sensors:
U
nits 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
t
he water heating element and its
connections.
Reset alarm.
10
Over temperature
E
lectrical after-heating
The electrical heating element has
o
verheated.
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.
C
heck filters and the air intake.
Reset alarm.
If the above does not resolve the issue,
contact service.
11
Low flow over
t
he electrical heating
element
Lack of airflow in the supply air.
S
ee alarm code 10.
See alarm code 10.
VPL28 (English)
BY NILAN
35
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