Fujitsu AIRSTAGE V-II, Service Manual

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Check Point 1 : Check Connection
Check terminal connection of Compressor (loose or incorrect wiring)
Check Point 2 : Check Winding Resistance
Check winding resistance of each terminal
If the resistance value is 0 or infinite, replace Compressor.
(Check again after several minutes because the protector may be
operated.)
SERVICE PARTS INFORMATION 2
Constant Speed Compressor
terminal
Magnetic relay
Check connection of magnet relay (Loose or incorrect wiring)
Resistance
Value (25 °C)
1.835
Attention!!
The constant speed compressor is equipped with a
protector. It detects the inside temperature and the
current value, and if it detects an over current or too
high temperature, the protector is operated to stop
operation of Compressor. (Protector operates within
the range in the following graph, and it is released
when the temperature becomes lower than approx.
80 °C.
Internal Protector
Protector operation range
Check Point 3 : Check Cause of Protector Operation
Due to unstable power supply, Compressor is causing an abnormall
y high temperature.
>> Check Power Voltage once again.
Due to missing phase, Compressor is causing an abnormally high t
emperature.
>> Check loose or open connection cable once again.
Due to less refrigerant, the cooling effect inside Compressor is
decreased.
>> Check if there is a gas leak or less refrigerant.
RED
RED
WHITE
WHITE
BLACK
BLACK
compressor
W (C)
(BLACK)
V (S)
(WHITE)
U (R)
(RED)
Terminal cover opened
R
U V W
S T
W (C)
U (R)
V (S)
1.884
1.865
50
0
10
20
30
40
60 70 80 90 100 110 120 130 140 150 160 170
Temperature [ °C]
C
ur
re
nt
[A
]
04-99