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Idiomas disponibles
9 - Fault finding
FAULT
FAN(S)
ALWAYS ON
FAN(S) NOT
WORKING
HIGH COMPR.
DELIVERY
PRESSURE
(HP ALARM)
worn / faulty
NOISY
FANS
(running hot)
UNIT
VIBRATES
Liebert
HCR - UM - 265224_EN - 13.10.2022
®
C
A
U
S
E
Transducer
No
NTC sensor
disconnected
disconnected
Yes
Check
Connect/set
wiring or
dip switch 4
replace
burnt out
fan motor
Y
s e
replace
fan motor
Yes
Yes
No
faulty
bearings
fan motor
unit not
No
fan impellers
fixed to
unbalanced
ground
Yes
Yes
fix as in
verify /
Chap. 1
replace
and 2
No
Pressure
switch welded
Yes
to OFF
in CHAP . 3
No
No
defective
cooling coil
Main switch
Y
s e
replace
(see CHAP .4)
no evident
No
problem but
still too noisy
Yes
increase
No
unblock
Variex
set-point
(where
possible)
R
E
M
E
D
Y
No
Yes
replace
clean as
Yes
Variex does
No
dirty
not
intervene
Y
s e
Yes
adjust
miscalibrated
No
Yes
faulty
replace
No
capillary or
Yes
needle
presser/needle
plugged
No
seek
external
assistance
No
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