Fujitsu WPYA100LA Service Manual page 10

CHECK FOLLOWING STEPS
[fig. 1] Continuity of current fuse on the PCB (CONTROL-
LER)
FUSE CF3
(250V T5A)
PCB
(CONTROLLER)
[fig. 3] Voltage of PUMP on the PCB(CONTROLLER)
PCB
(CONTROLLER)
FUSE CF3
(250V T5A)
+
B
0
Measure voltage between the connector pins of con-
nector . Connector shall be checked during heat-
7
7
ing or cooling operation.
Measure voltage as follows without taking off the con-
nector .
7
between black and white
+
AC207~253V
0Ω
FUSE CF1
(250V T25A)
0Ω
-
7
PUMP
W
PCB
approx.
(CONTROLLER)
is Normal
Pump Error
TROUBLESHOOTING GUIDE
[fig. 2] Voltage of fan motor on the PCB(CONTROLLER)
+ + + - +
9
FAN MOTOR
BL Y W B R
Measure voltage between the connector pins of con-
nector . Connector
9
ing or cooling operation.
Measure voltage as follows without taking off the con-
nector .
9
between red and black
+
between yellow and black
+
between white and black
+
[fig. 4] Resistance of 4-way valve coil
1360
Take off the connector and check the resistance 4-way
valve coil.
– 10 –
PCB
(CONTROLLER)
FUSE CF4
(250V T3.15A)
0
shall be checked during heat-
9
approx. DC200~370V PCB
approx. DC3~7V (CONTROLLER)
approx. DC15V is Normal
Fan motor
Error
4-way valve coil