Capi. Heater Control; Aip Heater Control; Buzzer Control - Panasonic MDF-DU702VH Service Manual

４．Capi. heater control
（１）Outline
In order to prevent oil clogging in the capillary, the compressor is periodically stopped, and the heater attached
to the capillary is energized. Even if the compressor is in operation, the compressor is forcibly stopped for a
certain period depending on the condition.
（２）Set value（service work）
Item
Capi. Heater time
Capi heater mode
（３）Control
If AUTO is set, the following operation is performed after 18 hours of product operation start (every 18 hours
thereafter). If OFF is set, the same operation as AUTO is performed but only the energization of the capi. heater
is canceled.
① Energize the capillary every 18 hours and do not start the compressor during this time.
② If the internal temperature has not reached the OFF1 point, set the compressor to the forced ON state
and wait until OFF1 or less.
③ If it does not reach OFF1 or less even after 60 min elapse, forcibly stop the compressor and energize
the capillary.
When On is set, the forcible compressor is stopped and the capillary is energized. After that, it switches to AUTO.
compressor
Capi. heater
When OFF is set to
the cap heater mode
a does not conduct
capillary current. Only
the compressor turns
off for 8 minutes.
５．AIP heater control
This heater is always turned ON, but for energy saving or protection of abnormal heating, is turned OFF
under the following conditions
Heater OFF condition
・ When the chamber temp is more than -39℃, turn off.（when it is less than -40℃, turn ON）
・ Opening the door
・ On power failure or demo mode
６．Buzzer control
Refer to the following to the types and specifications or buzzer sound and the beep conditions.
Buzzer sound spec.
Spec.（On ms/Off ms/On time）
(120ms/120ms/twice)
(780ms/220ms/continue)
(60ms/1600ms/continue)
Range
0 min, 6~15 min
0: AUTO / 1 : ON / 2 : OFF
Interval
(18hour)
(8min)
Power ON
Capi. ON
Fig. 4 Capi. energization timing
Starting sound
Alarm sound（long）
Alarm sound（short）
Default
8 min
2 : OFF
Interval
Interval
(18hour)
(18hour)
(8min)
Capi. OFF Wait for Comp stop and
then turn on cap
Type
Power failure、alarm history, ALARM test
-28-
(8min)
compressor wait
(MAX. 60 min)
As the compressor wait for 60
minutes has passed, forcibly stop the
compressor and turn on the cap
Condition
Starting sound（normal）
Alarming
.