Fujitsu WPYA050LE - Diagnostic Steps

- 9 -
CHECK FOLLOWING STEPS
TROUBLESHOOTING GUIDE
[g. 3] Voltage of PUMP on the PCB(CONTROLLER)
[g. 2] Voltage of FAN MOTOR on the PCB(CONTROLLER)[g. 1] Continuity of current fuse on the PCB (CONTROL-
LER)
14
PCB
(CONTROLLER)
(WHITE)
BL Y W B R
14
FAN MOTOR
+ + + +
-
[g. 4] Resistance of 4-way valve coil
Take o the connector and check the resistance 4-way
valve coil.
[FUSE CF1,3]
[FUSE CF2]
Measure voltage between the connector pins of con-
nector
14
. Connector
14
shall be checked during heat-
ing or cooling operation.
Measure voltage as follows without taking o the con-
nector
14
.
Measure voltage between the connector pins of con-
nector
13
. Connector
13
shall be checked during heat-
ing or cooling operation.
Measure voltage as follows without taking o the con-
nector
13
.
PCB
(CONTROLLER)
is Normal
PCB
(CONTROLLER)
is Normal
between red
+
and black
−
approx. DC200~370V
between yellow
+
and black
−
approx. DC3~7V
between white
+
and black
−
approx. DC15V
between white
+
and black
−
approx. DC200~370V
between brown
+
and black
−
approx. DC3~7V
between red
+
and black
−
approx. DC15V
FAN MOTER
Error
PUMP Error
4-way valve coil
1.4kΩ
13
PCB
(CONTROLLER)
(RED)
BL BR R B W
13
+ + + +
-
PUMP
[g. 5] Resistance of the heater for tank
10
PCB
(CONTROLLER)
2.6kΩ
W
W
PCB
(CONTROLLER)
FUSE CF1
FUSE CF3
0Ω
PCB
(CONTROLLER)
FUSE CF2
(250V T3.15A)
0Ω