Sanyo MDF-U55V, Руководство по обслуживанию

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11. Compressor control (differential) value
Compressor H:
Turns on when a chamber temperature is set temperature -0.4
䉝
.
Compressor L:
1) Turns on when compressor H turns on and a cascade sensor temperature is -34 䉝 .
2) Turns on after 3 minutes elapse since compressor H turned on
Compressor H, L:
Turns off when a chamber temperature is set temperature -1.6
䉝
Interval:
1 minute *
* ‘Interval’ means that a period one of compressor either H or L turns on after another one was
turned on.
Note) Compressor L does not turn on until 1 minute elapses since compressor H turned on,
if a temperature in cascade sensor is lower than -34
䉝
.
Protection for compressor H:
Compressor H turns off to prevent it from being warmed up that is caused by fan motor lock.
Filter sensor temperature:
Compressor H turns off when a filter sensor temperature is higher than 60
䉝
. It will turn on again
when the filter sensor temperature is lower than ambient tempe10 䉝 .
<Operational chart of compressor H/L during cycle>
SV
Chamber
temp.
(
䠬䠲
)
1min or over
PV=SV-1.4
SV-0.4 䉝
SV-1.4 䉝
Comp. H&L OFF
PV=SV-0.4
PV=SV-1.4
PV=SV-0.4
CT=-34 䉝
Comp. H ON
Comp. L ON
Cascade
temp.
(CT)
Comp. H
CT=-34
䉝
3min. or over
䠄
Comp. delay
䠅
1min or over
3min. or over
䠄 Comp. delay 䠅
CT=-34
䉝
Comp. L
Comp. H ON
Comp. H&L OFF
Comp. L ON