Fisher & Paykel RX256DT4X1 Service Manual Download

Page: 71 / 108

321023

Symptom

Possible Cause

Test Procedure

Repair

Water starts to
dispense as soon
as Water Mode is
selected without
pressing the main

Failed main
dispenser switch
(failed short)

Disconnect power. Remove both leads from the
switch and measure resistance across switch
terminals. Resistance should read less than 1

Ω

in this position and higher than 10 M

Ω

when

switch is open.

Replace switch.

dispenser switch.

Failed PCB

With PCB powered, measure voltage on pin 7 (YL
wire) of 10-pin connector. Voltage should read 0
VAC.

Replace PCB.

Ice LED is
illuminated but
does not dispense
cubed ice when
main dispenser
switch

Failed main
dispenser switch
(failed open).

Disconnect power. Remove both leads from the
switch and measure resistance across switch
terminals. Resistance should read less than 1

Ω

this position and higher than 10 M

Ω

when switch

is open.

Replace switch.

is pressed.

No continuity.

Disconnect power. Remove the cover of freezer
door hinge located on top of the unit and
disconnect the connectors. Check pin 9 (OR
wire) of 10-pin connector for continuity.

Repair open
connection.

Failed

auger

motor

or PCB.

With PCB powered, press the Main dispenser
switch. Measure voltage on pin 9 (OR wire) of
10- pin connector. Voltage should read 120VAC.

Replace auger
motor if voltage
reads 120VAC.
If not, replace PCB.

Ice starts to
dispense as soon
as Ice Mode is
selected without
pressing the main
dispenser switch.

Failed main
dispenser switch
(failed short).

Disconnect power. Remove both leads from the
switch and measure resistance across switch
terminals. Resistance should read higher than
10 M

Ω

when switch is open and less than 1

Ω

when switch is closed.

Replace switch.

Failed PCB.

With PCB powered, measure voltage on pin 9
(OR wire) of 10-pin connector. Voltage should
read 0 VAC.

Replace PCB.

Dispenser operates
continuously even
when Dispenser
Lock Mode is
activated.

Failed PCB.

With PCB powered, measure voltage on pin 5
(PK

wire) of 10-pin connector. Voltage should

read 0 VAC.

Replace PCB.

Auto Light Mode
does not operate.

Failed PCB.

With PCB powered and Auto Light activated, cover the
light sensor. Measure voltage on pin 8 (BR wire) of
10-pin connector. Voltage should read 1/2 the AC
power supply (120 VAC).

Replace PCB.

Ice or Water
dispenser
mechanism runs
continuously.

Failed PCB.

With PCB powered, measure voltage on pin 5
(PK wire) of 10-pin connector. Voltage should
read 0 VAC.

Replace PCB.

Filter Status LED
never changes to
red.

Failed PCB.

Verify with the user if unit has been unplugged
for a long period. Demonstrate reset operation to
customer.

Replace water filter
and reset Filter
Status. Replace
PCB if problem
continues.
Customer
education.

Auger motor
operates in Ice or
Crush Mode but ice
door chute never
opens.

Failed solenoid.

Disconnect power. Remove both leads from the
solenoid and measure the resistance across
solenoid terminals. Resistance should read
101.2 ± 10%.

Replace solenoid.

Auger motor
operates in Ice or
Crush Mode but ice
door chute never
closes.

Failed PCB.

Measure voltage on pin 10 (BU wire) of 10-pin
connector. Voltage should read approximately
55VDC when ice chute door is open (solenoid
energized) or 0VDC when closed (solenoid not
energized).

Replace PCB.