Owner Manual

Check the frost on the cabinet liner surface, if find like following:

1) No frost, then do the leakage detecting.

A). If the leakage point is found, then first cut off the low pressure pipe to discharge the left

refrigerant in the system, then clean the pipe, replace with a new dry filter and welding again,

again recharge the refrigerant and do the leakage detecting.

B). If the leakage can not be found, cut off the low pressure pipe, if there is no refrigerant

omitting, then recharge the refrigerant and do the leakage detecting again; If there is refrigerant

omitting, cut off the high pressure pipe(means that compressor suction is normal), charge the

condenser pipe with pressurized nitrogen, if no air at low pressure side, means the pipe is

blocked, then replace the blocked parts and clean the system pipe; If no air suction at compressor

low pressure side, cut off the high pressure pipe, means air compression of the compressor is not

good, please replace the compressor.

2). A little frost on the surface, also do the leakage detecting first.

A) If the leakage point is confirmed, then cut off the low pressure pipe, if a little

refrigerant air spurt out, means that the system leaks slowly on the leakage point, you should

repair the welding of cut pipe and the leakage point and clean the system pipe by the high

pressure nitrogen, replace the dry filter, after completion these work, re-vacuum and recharge the

refrigerant, at last do the leakage detecting again.

B). If big quantity refrigerant spurt out, cut off the high pressure pipe to check the suction of

the compressor low pressure pipe is normal or not: if no suction or weak suction, it means not

good compression and need to replace the compressor; if normal suction, then charge the clean

and warm nitrogen to the condenser pipe, if you find the returned nitrogen of the low pressure

side is not sufficient, it means that the system pipe is clogged lightly, please replace the clogged

parts and clean the pipe.

3). No frost, but have condensate water on the surface on the cabinet liner, check the temperature

of the high pressure side pipe and the compressor, you will find it is too high temperature and

check the low pressure pipe with frost, if like this, means too more refrigerant in the system,

please recharge with appropriate quantity refrigerant once more.

4) The unit works discontinuously, maybe the system is clogged with ice, please replace the dry

filter and clean the system with clean and warm nitrogen.

5) Compressor doesn’t run.

Please check the electrical parts, such as PTC starter, capacitor, overload protector, thermostat

etc., if you find the parts go wrong, then replace a new one with same type and specification. If

all of these parts are good, please measure the resistance of the compressor winding, if the

resistance is abnormal, must replace the compressor; otherwise check the overload protector act

or not, means the over large current and compressor goes wrong, also replace the compressor.