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Malfunction Possible causes Checks Remedial measures
Medium outlet
Drop formation at connec-
tion points of the pipeline.
Leakage of the joint Seal the joint.
Condensate formation
Uninsulated cables or com-
ponents, defective insula-
tion.
Attach or repair the insula-
tion.
Operational malfunctions (continued)
Mal-
function
Possible causes Checks Remedial measures
ALA04 Medium inlet probe defective Check resistance at B4 Replace defective probe.
ALA06
Outside temperature probe
fault (optional)
Check resistance at B6
(optional)
Replace defective probe.
ALA07
Medium outlet sensor defec-
tive
Check resistance at B7 Replace defective probe.
ALA08
Suction gas temperature
probe fault (optional)
Check resistance at B8
(optional)
Replace defective probe.
ALA09
Hot gas temperature probe
fault (optional)
Check resistance at B9 Replace defective probe.
ALA11 High-pressure probe fault Check resistance at B11 Replace defective probe.
ALA12
Low-pressure probe fault
(optional)
Check resistance at B12
(optional)
Replace defective probe.
ALB01
High-pressure switch, high-
pressure alarm
Condenser lined, dirty or
exposed to excessive sun-
light? Condenser fan defec-
tive?
Clear condenser, clean,
shade, have condenser fan
checked by specialist per-
sonnel.
ALB02
High-pressure probe high-
pressure alarm
ALB03
Low-pressure probe low-pres-
sure alarm
Cooling cycle OK? Check the
flow sensor
Have the cooling cycle
checked by a specialist com-
pany
, replace the flow sensor.
ALB04
Low-pressure switch low-pres-
sure alarm
ALC01
Compressor overload
(optional)
Motor overload protection
switch triggered? Compressor
power consumption too high?
Check motor overload protec-
tion switch (setting range),
have the compressor checked
by a specialist company
.
ALP02
Overload circulation pump
(optional)
Motor overload protection
switch triggered? Circulation
pump power consumption too
high?
Check motor overload protec-
tion switch (setting range),
have the pump checked by a
specialist company
.
ALP03 Medium flow disturbance
Check: Air in the medium
piping -Open shut-of
f devices -
Medium pressure -Circulation
pump capacity -Switching
behaviour of the differential
pressure switch -Medium flow
rate
-Bleed the medium cycle
-Open shut-off valves
-Raise medium pressure
Have the circulation pump, dif-
ferential pressure and medium
flow rate checked by a spe-
cialist company.
REMKO KWE
54
54


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