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7 - Assistance and
maintenance
7.1 - Ordinary maintenance
a) fan(s): check that they are rotating freely without any abnormal
noise and that the electrical absorption is correct.
b) cooling coil: look up into the bottom side of the coil and check
to see if it is dirty; if necessary clean it as follows:
•
in spring: clean with a vacuum cleaner to remove polien;
•
in summer: as the maximum cooling load is required in sum-
mer it is especially important to keep the coil clean so as to
prevent the intervention of the HP pressure switch on the room
unit.
•
in winter: clean with water (with the air conditioner switched
on) to remove smog deposits from fins;
FAULT
FAN(S)
ALWAYS ON
FAN(S) NOT
WORKING
NOISY
FANS
DRY COOLER
STRUCTURE
VIBRATES
8
C
A
U
S
E
burnt out
motor
replace
fan
motor
Yes
worn / faulty
No
faulty fan
bearings
motor
(running hot)
No
fan impellers
unit not fixed
unbalanced
to ground
Yes
fix as in
verify /
CHAP . 2
replace
ATTENTION: This operation must only be carried out
by an experienced refrigeration technician so as to pre-
vent the coil being damaged.
8 - Quick guide to fault finding
Dry Cooler working mode depends on ambient conditions and so
the operation of the conditioning unit to which it is coupled; the
user is advised to refer to the room unit manual as well as the fault
following troubleshooting.
and
No
defective
switch
Y
s e
Y
s e
replace
Yes
fan speed
No
regulator R
installed
Yes
miscalibrated
No
Yes
Yes
adjust
(see CHAP . 4)
Dry Coolers
R
E
M
E
D
Y
fan speed
No
regulator R
adjust
Yes
miscalibrated
(see CHAP . 4)
No
Yes
replace
No
No
installed
Y
s e
No
faulty
No
seek
external
assistance
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