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