Sanyo MCO-18AIC Service Manual page 15

E05,E06 : Temp. sensor malfunction (open / short circuit)
When the micro-computer detects an internal temperature as 0 C or lower, it is
judged as "open circuit" displaying alternately "E05" with PV and sounding
intermittent buzzer.
When the micro-computer detects an internal temperature as +60 C or higher, it is
judged as "short circuit" displaying alternately "E05" with PV and sounding
intermittent buzzer.
Note)
In E05 and E06, displayed PV is different from product's actual temperature)
E07,E08 : CO box temp. sensor malfunction (open / short circuit)
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See E05, E06 in details.
(Note: In E07 and E08, CO
E09, E10: Ambient temperature sensor malfunction (open / short circuit)
See E05, E06 in details.
E11 : CO sensor output voltage is abnormal
2
When CO
not occurred, it is judged as CO
than 1000mV or higher than 4800mV. "E11" and "internal temperature" are
displayed alternately, and buzzer sounds intermittently.
At the time, CO
E12 : Main heater is abnormal
When high temperature alarm is activated, when the main heater is open circuit,
and when the main heater SSR is short circuit, "E12" and an internal temperature
are displayed alternately and buzzer sounds intermittently. An error is not
displayed just after failed because the self-diagnosis for SSR and heater failure is
done only in every 40min or in the power supplied.
(Above description is also applied for E13 - E16)
E13 : Bottom heater is abnormal
When the bottom heater is open circuit, or SSR is short circuit, "E13" and an
internal temperature are displayed alternately, and buzzer sounds intermittently.
E14 : Door heater is abnormal
When the door heater is open circuit, or SSR is short circuit, "E14" and an internal
temperature are displayed alternately, and buzzer sounds intermittently.
E15 : CO sensor box heater is abnormal
2
When the CO
internal temperature are displayed alternately, and buzzer sounds intermittently.
E16 : SSR is open circuit
When any SSR of main heater, bottom heater, door heater and CO
heater is open circuit, "E16" and an internal temperature are displayed alternately,
and buzzer sounds intermittently.
E17 : Sample pump and Auto zero pump malfunction
In CO SV is 3.5% or higher and the current level is 3.5% or higher, if the
2
difference of voltage between "during Auto Zero " and "before Auto Zero" is 150mV
or lower, it judges as "Sample pump and Auto zero pump malfunction". "E17" and
an internal temperature are displayed alternately and buzzer sounds intermittently.
At the same time CO
The judgement would be done in every Auto Zero adjusts, however, the judgement
st
in the 1 interval in Auto Zero would be ignored.
valve is closed)
2
sensor box temperature is stable and high or low temperature alarm is
2
2
valve is closed.
2
sensor box heater is open circuit, or SSR is short circuit, "E15" and
2
valve is closed.
2
12
sensor malfunction if CO output voltage is lower
2
sensor box
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