Failure Code List - Panasonic NE-1878BPQ Service Manual

5.1.1.

Failure code list

F □□ : Device failure / U □□ : User error
DISPLAY
Upper circuit Lower circuit
F00 • Communication error between the micro-
F01 • Abnormal rise in the exhaust temperature
• Overheating and ignition of food in the oven.
F03 • Upon detection of an abnormal voltage for
• Displayed only when the failure code is
F18 F19 • Error in detection of the secondary current.
F32 F22 • Open or short-circuit in the MAG thermistor.
F33 • Open or short-circuit in the exhaust thermis-
F44 • Shorted membrane switch.
• With a continued press of the same key for
F77 • Lock detection of cooling fan motor (for con-
F90 FE0 • Abnormal
F92 FE2 • Magnetron failure (Detection of A-K short
F95 FE5 • Inverter actuation signal failure
F96 FE6 • Inverter actuation signal failure.
F97 FE7 • Inverter actuation signal failure.
F98 FE8 • Inverter actuation signal failure.
F99 FE9 • If actuation signal is input to the microcom-
U30 • Memory cooking with double/triple quantity
U40 • Abnormal temperature detection of magne-
U41 • Abnormal secondary current detection of
CONDITIONS
computer and the memory IC.
(120 °C or higher).
10 seconds.
called up.
tor.
2 minutes.
trol board (D.P.circuit)).
temperature in
H.V.Inverter.
circuit.)
(At startup of inverter, an actuation signal
has not been input.)
(During non-actuation of inverter, an actua-
tion signal is Lo.)
(During actuation of inverter, an actuation
signal is Hi)
(At startup of inverter, an actuation signal is
Hi.)
(At startup of inverter, an actuation signal is
Lo)
puter when the inverter is not in actuation.
has exceeded the maximum cooking time.
tron when the oven is operated without food
(Empty heating detection).
H.V.inverter when the oven is operated with-
out food (Empty heating detection).
RESET
• Press Stop/Reset button.
• Reset when the tempera-
ture in the oven falls to 60
°C or less.
• Press Stop/Reset button.
• Press Stop/Reset button.
-
-
• Press Stop/Reset button.
• Press Stop/Reset button.
IGBT of • Press Stop/Reset button.
• Press Stop/Reset button.
• Press Stop/Reset button.
• Press Stop/Reset button.
• Press Stop/Reset button.
• Press Stop/Reset button.
• Press Stop/Reset button.
• Press Stop/Reset button.
• Press Stop/Reset button.
• Press Stop/Reset button.
18
CAUSES / REMEDIES
• Control board (D.P.circuit)
• Clean the inside of the oven and the
exhaust channel. Replace parts if
necessary.
• Exhaust thermistor (Insulation failure)
• Check the power-supply voltage.
• Control board (D.P.circuit)
• Confirm the grounding
H.V.Inverter.
• Confirm the grounding state of control
board (D.P.circuit).
• H.V. Inverter (Insufficient cooling)
• MAG thermistor
• Exhaust thermistor
• Membrane switch
• DC fan motor
(Cooling fan for control board (D.P.cir-
cuit))
• Insufficient cooling of H.V.Inverter
(Fan Motor / fan motor drive circuit)
• Magnetron
• Inverter connector disconnection
• Latch adjustment failure
• H.V.Inverter
• Control board (D.P.circuit)
• Absence of any inverter AC input
(Door switch / Relay circuit / Relay
connector / CN702 disconnection,
etc.)
• Magnetron
• Magnetron (breaking of heater wire,
etc.)
• H.V.Inverter
• Disconnection of magnetron's lead
wire
• Control board (D.P.circuit)
• Check and change the time.
• Confirm the inside of the oven.
• Magnetron thermistor
• Confirm the inside of the oven.
• H.V. Inverter
state of