Fagor AD – 21 W Service Manual - page 14
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P. 14
TROUBLESHOOTING
SYMPTOM
POSSIBLE CAUSE
ACTION
Dishwasher will NOT FILL
after the door is closed.
Power “ON” light (L1) is not
illuminated.
Service breaker tripped
Reset. If the breaker trips again, contact an electrician to
verify amps or possible short.
Machine not connected to
power source.
Verify the unit is connected to a hot (live) feed. Verify
voltage and proper phasing.
Faulty Circuit Board
Make sure power is being supplied to the board. Check
for loose wiring harness connections. Check circuit board
fuse. Check voltage between R (brown) and N (blue). If
208V-240V found, replace circuit board.
Dishwasher will NOT FILL
or reach the appropriate
water level after the door is
closed. Power “ON” light (L1)
is illuminated.
No water to machine
Verify hose is not blocked or kinked, water valve is open
and pressure > 20 psi.
Machine not level
Level machine. Legs are height adjustable.
Overflow tube not attached
or broken / missing O-ring.
Check condition of overflow tube. Make sure O-ring is in
good working condition and in place.
Faulty door switch
Verify the wiring at the switch for loose connections; if
no loose connections are present, replace the switch (Ip)
or the door relay (Cp)
Faulty fill pressure switch
(P1)
Verify voltage at terminal 2 (brown) and GND. If no
voltage, P1 is possible stuck.
Faulty rinse/fill valve (V)
Verify the wiring and proper voltage at valve; if correct
replace fill valve.
Dishwasher will NOT RUN
after the door is closed.
Power “ON” light (L1) is
illuminated and the unit has
completed the filling and
heating cycle.
Faulty fill pressure switch
(P1)
Verify it changes position of the switch; on terminal 1 to
2 (fill), and 1 to 3 (heating) If not replace it.
Faulty Power/Start button
(St)
Verify good connection between digital start buttons and
circuit board. If disconnected, reconnect and verify.
Verify circuit board fuse is If connected and still not
working, replace Adhesive Trim.
Faulty Circuit board
Make sure power is being supplied to the board. Check
for loose wiring harness connections. Check circuit board
fuse. Check voltage between R (brown) and N (blue). If
208V-240V found, replace circuit board.
Faulty wash pump (MBL)
Rotate the pump from the shaft flat head slot counter-
clock wise to verify free rotation. Verify that the wash
pump is getting power. If so, replace the pump.
Faulty start buttons
Verify good connection between digital start buttons and
circuit board. If disconnected, reconnect and verify.
Verify circuit board fuse is If connected and still not
working, replace Adhesive Trim.
Rinsing temperature gauge
is lower than 180ºF.
Wait until sanitized rinsing temperature reached a min.of
180ºF. Check out your incoming water temperature.
Recommended incoming water temperature is 140°F