Haier DW-86L338, Руководство по обслуживанию

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decreases to 1.35MPa, contact connects, low temperature cabinet starts up; when
pressure exceeds 2.1MPa again, contact disconnects again, and it circulates in order.
Note: When pressure switch is being welded, put a wet towel on it to keep temperature
below 100
℃
. The parameters of pressure switch cannot be adjusted.
Parameters: voltage 220V, 50Hz, contact capacity: 6A.
Freezing medium
Freezing medium is mixture, part of it is inflammable and explosive freezing medium,
ventilation is required at infusion place. In case of leakage, avoid fire and spark near the
place. When refrigerating system has a problem, it shall be judged by local after ‐ sale
service personnel, the problem shall be feed ‐ backed. The technicians of Medical
Application Business Department shall instruct local after ‐ sale service personnel to repair
it.
Infusion of freezing medium
When DW ‐ 86L386 series of ultra ‐ low temperature cabinet products are repaired, there are
very strict requirements for environment and repair, otherwise, refrigerating effect may be
bad; to normalize the maintenance operation specification of medical application
refrigerator DW ‐ 86L388 series of ultra ‐ low temperature cabinet products, the following
requirements shall be followed: Before the maintenance of system, at first, you should
know the refrigerating principle of DW ‐ 86L388 series of ultra ‐ low temperature cabinet
products, the series of model is two ‐ level refrigeration, which is divided into two
independent systems of high temperature level and low temperature level; at the time of
maintenance, the two systems shall not be opened at the same time, you must distinguish
which system is failure, then open that system.
The humidity in maintenance shop shall not be too large, if it is cloudy or rainy, don’t open