4) In case indication on display is :
– 50 –
Check dual
pressure switch
(DPS)
Replace dual pressure switch.
Normal
Voltage
between controller
1
terminal and ground
wire is 0V
Check fan motor and
brush used for
fanmotor.
NO
(Battery voltage)
YES
Is
battery voltage
measured at L line
of fan
L line between fan
motor and relay box
(F
3
fuse) is broken or
contact of connector is
defective.
BY and G lines between DPS
and relay box and controller
are broken or contact of
connector is defective.
Controller is defective.
YES
Clean coil.
YES
NO
YES
Is
battery voltage
measured at GR line
of fan
NO
Controller is defective.
NO
YES
YES
Controller
Y
terminal is under
0.5V.
NO
YES
• AR
4
relay is defective.
• GR line and G line between AR
4
and fan motor are broken or
contact of connector is defective.
Abnormal
Condenser coil
is stained.
Condenser
fan motor will
not turn.
Is battery
voltage measured at
at terminal
V
of
controller?
