Sanyo MCO-5M Service Manual page 18

E18 : UV lamp malfunction (UV lamp is optionally provided)
In the UV lamp lighting time is set in F01, the microcomputer checks the output
voltage in UV detect circuit after 25 29 sec. Since the door was open and shut. If
the detected value is 0.05V or more, it is counted as " ". If the detected value is
0.05V or less, it is counted as " ". The microcomputer checks again after 30 sec.
then, the value " " means "UV lamp is functional". The value " " means "UV lamp
is malfunctioned". "E18" and "internal temperature" are displayed alternately, and
buzzer beeps intermittently. Press BZ key to cancel the error. The microcomputer
does not check if the door is open in 30 sec. after the door was shut.
E19 : O sensor is abnormal
2
When CO
not occurred, it is judged as O
than 3mV or higher than 3000mV. "E19" and "internal temperature" are displayed
alternately, and buzzer sounds intermittently. Press BUZZER key to cancel error.
Upper limit temperature alarm:
When the internal temperature is out of SV, OVERHEAT lamp illuminates
displaying "PV" with "E12" (main heater malfunction) or "E16" (SSR for each
heater is open circuit) alternately. The buzzer sounds intermittently. It is impossible
to stop the buzzer sounding by BUZZER key.
At the time heaters (main heater, bottom heater and door heater) will be OFF.
Automatic temperature alarm:
When the internal temperature is 1.0 C out of SV, all digits in temperature display
blink and intermittent buzzer sounds with 15minutes delay.
Automatic CO level alarm:
2
When the internal CO
intermittent buzzer sounds with 15minutes delay.
Automatic O level alarm:
2
When the internal O
intermittent buzzer sounds with 30minutes delay.
UV lamp auto lighting:
If the door is not opened for 12 hours, UV lamp is lit automatically to sterilize in the period
that sets in F01.
Note) UV lamp is optional accessory.
7. Key Lock function
Key Lock mode
Note)
sensor box temperature is stable and high or low temperature alarm is
2
level is 1.0% out of SV, all digits in CO
2
level is 1.0% out of SV, all digits in CO
2
: In PV display, press
mode, and "L0" is displayed.
Press key to set 1 ......... Key Lock ON
Press key to set 0 ......... Key Lock OFF
Press SET to memorize and automatically reverts to PV display.
In Key Lock "ON", the device can enter into SET mode to check SV,
however, the value cannot be changed. The device also cannot enter
into Function mode.
sensor malfunction if O
2
key (shift key) for 5 seconds to enter Key Lock
15
output voltage is lower
2
display blink and
2
display blink and
2