Rotenso J100Wi, Руководство по обслуживанию, Страница: 76 / 132

LCAC R32 Series
76 Service manual
2.2 Power on and let the air conditioner operate for cooling. Check operation status of drainage pump, and
then connect the plug of water level switch, check the operation sound of water pump and observe whether
the water can discharge through the transparent hard pipe at drainage outlet. (In light of the length of
drainage pipe, water shall be discharged about 1 minute delayed)
2.3 Stop the operation of air conditioner, power off the power supply and put the cover of water test hole back
to the original place.
a) After stopped the air conditioner 3 minutes, check whether there is anything abnormal. If drainage
pipes have not been distributed properly, over back-flow water shall cause the flashing of alarm indicator
at remote-controlled receiving board and even water shall run over the water collector.
b) Continuously infusing water until water level alarmed, check whether the drainage pump could
discharge water at once. If water level does not decline under warning water level 3 minutes later, it
shall cause shutdown of unit. When this situation happens, the normal startup only can be recovered by
turning down power supply and eliminating accumulated water.
Note
: Drain plug at the main water-containing plate is used for eliminating accumulated water in water-
containing plate when maintaining air conditioner fault. During normal operation, the plug shall be filled in
to prevent leakage.
6.4 INSULATION WORK OF DRAINAGE PIPE
Refer the introduction to the insulation engineering parts.
7. VACUUM DRYING AND LEAKAGE CHECKING
7.1 PURPOSE OF VACUUM DRYING
• Eliminating moisture in system to prevent the phenomena of ice-blockage and copper oxidation.
Ice-blockage shall cause abnormal operation of system, while copper oxide shall damage compressor.
• Eliminating the non-condensable gas (air) in system to prevent the components oxidizing, pressure fluctuation
and bad heat exchange during the operation of system
7.2 SELECTION OF VACUUM PUMP
• The ultimate vacuum degree of vacuum pump shall be -756mmHg or above.
• Precision of vacuum pump shall reach 0.02mmHg or above.
7.1 OPERATION PROCEDURE FOR VACUUM DRYING
Due to different construction environment, two kinds of vacuum drying ways could be chosen, namely ordinary
vacuum drying and special vacuum drying.
7.3.1 Ordinary vacuum drying
1. When conduct first vacuum drying, connect pressure gauge to the infusing mouth of gas pipe and liquid pipe,
and keep vacuum pump running for 1hour (vacuum degree of vacuum pump shall be reached -755mmHg).
2. If the vacuum degree of vacuum pump could not reach -755mmHg after 1 hour of drying, it indicates that there
is moisture or leakage in pipeline system and need to go on with drying for half an hour.
3. If the vacuum degree of vacuum pump still could not reach -755mmHg after 1.5 hours of drying, check whether
there is leakage source.
4. Leakage test: After the vacuum degree reaches -755mmHg, stop vacuum drying and keep the pressure for 1
hour. If the indicator of vacuum gauge does not go up, it is qualified. If going up, it indicates that there is moisture
or leak source.
PART 4. INSTALLATION