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Trouble shooting
Fault finding
HL
16
Symptoms Display Problem
No air flow
from room
OFF
unit
Insufficient
air flow
Normal
from room
display
unit
HL
HL
H
No cooling
L
HL
Call for a service technician, if you can't solve the problem or the problem reoccurs. Only a
competent electrician should attempt to rectify electrical supply problems. Only a competent
refrigeration engineer should work on the refrigeration system.
Possible cause
Power outlet in
wall is off/ dis-
Power (230V)
connnected
connected but
no function
Defect on electrical
equipment/ cables
Blocked air
Room unit has
ways
blocked air ways
Unit is defrosting
Unit is defrost-
in regular intervals
ing
(normal behaviour)
Refrigera-
Indoor tem-
tion system
perature too high
in danger for
(above 35 °C)
overheat
Too little water/
glycol fluid in the
system
External heat
exchanger has
High pressure
blocked air ways
state
kinked hoses
(NB: Resetting
alarm needed -
External heat
see page 14)
exchanger unit
mounted in very
high ambient tem-
perature
Leak in the water/
glycol system
Low pressure
Room unit has
state
blocked air ways
(NB: Resetting
alarm needed -
Loss of refrigerant
see page 14)
Kinked hoses
Condensate
The unit has
pump un-
been unplugged
able to reduce
without beeing in
water
standby mode for
30 min.
Service Guide: Trouble shooting
Action required
Turn on electricity and/or check
mains fuse
Call for an electrician.
Clean the air filter
(see instruction on page 15)
Do not adjust anything. Unit
will return to normal operation
after ten minutes.
Connect a T-split hose and two
outdoor heat exchangers to the
same ACT 7. This will make the
unit operate in higher tempera-
tures.
Top up the ACT-7 room unit
header tank with water/glycol
mixture.
(See instruction on page 7)
Clean the fan and the coil with
a vacuum cleaner or water and
a brush.
(see instruction on page 15)
Check the interconnecting line
for kinking and remove them
Move external heat exchanger
to a cooler/ shaded place
Call for a service technician.
Clean the air filter of the room
unit
(see instruction on page 15)
Call for a refrigeration engineer.
Check the interconnecting line
for kinking and remove them
If the symbol has not disap-
peared after 30 min., the water
has to be drained manually.
Call for a service technician.
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