Panasonic MDF-DU702VH, Service Manual

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Control specifications
Item MDF-DU502VH MDF-DU702VH
Temperature controller
Microprocessor control system
：
LCD touch panel input
Settable range : -90
℃～
-50
℃
(unit:1
℃
)
Memorized by Non-volatile memory
Temperature sensor Platinum resistance (Type: PT 1000
Ω
)
Temperature display
WVGA full color LCD
Digital display (Unit: 1
℃
)
Alarms
High / Low
temp. alarm
SV
±
5
℃～±
40
℃
, changeable (default:
±
10
℃
)
When the chamber temperature exceeds the alarm set temperature,
"Alarm" is displayed alternately in normal characters and reverse video
in the alarm display field and chamber temperature blinks. After 15 min.
(0-15 min. changeable, default: 15
℃
), "Warning" is displayed in the
message display field, buzzer beeps and remote alarm activates and
chamber temperature blinks.
Door alarm
When the door opens, "Open" is displayed alternately in normal
characters and reverse video in the alarm display field. After 2 min.
(0-15 min. changeable), buzzer beeps, no remote alarm activates.
Fan lock alarm No detection function.
Power failure
"Warning" is displayed alternately in normal characters and reverse
video in the alarm display field. And the notification is displayed in the
message display field. Buzzer beeps and the remote alarm activates.
Filter alarm
Filter alarm indicator is lit when the excessive dust is accumulated on
the condenser filter. When this indicator is lit, clean the condenser filter.
Remote alarm
Remote alarm terminal 3P; contact capacity DC 30 V, 2 A (Max)
Remote alarm activates when temp. alarm or power failure occur.
Parts
replace-
ment
notificati-
on
Battery age
Two type of battery accumulation time display in service mode. At
replacement time, it is informed in the message display field.
Fan motor age
Fan motor accumulation time display in service mode. Replacement
notification is not performed.
Status
Ambient
temperature
abnormality
When the sensor is out of the range of 35
℃
from 0
℃
, the
notification display in the message display field.
Supply voltage
drop
No detection function.
High-load
operation
display
When low side compressor operation rate is over 95 %, the notification
display in the message display field.
Self-diagnosis function
When a sensor is failed, the notification display in the message display
field. Buzzer beeps and remote alarm activates.
Compressor protection
Overload relay (internal)
Detected value of filter sensor is 50
℃
or more.
"Warning" is displayed alternately in normal characters and reverse
video in the alarm display field and the notification is displayed in the
message display field. Buzzer beeps and remote alarm activates.
Key lock
Selection of ON or OFF by slide in Key Lock mode.
OFF: Unlocked ON: Locked
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