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74
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.
13.5.4
Insulation work of drainage pipe
Refer the introduction to the insulation
engineering parts.
13.6 Vacuum Drying and Leakage
Checking
13.6.1
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.
13.6.2
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.
13.6.3
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.
1
Ordinary vacuum drying
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).
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.
If the vacuum degree of vacuum pump still
could not reach -755mmHg after 1.5 hours
of drying, check whether there is leakage
source.
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.
Summary of Contents for 38QUA009DS
Page 8: ...5 2 2 Part names of Indoor Outdoor units Cassette Unit...
Page 9: ...6 A5 Ducted Units A6 Ducted Units...
Page 10: ...7 Floor ceiling Units...
Page 11: ...8 HESP DUCTED Units...
Page 35: ...32 6 Wiring Diagram 6 1 Indoor Unit 40QTD018DS 40QTD024DS 40QTD036DS 40QTD048DS...
Page 36: ...33 40QSM018DS 40QSM024DS 40QSM036DS 40QSM048DS...
Page 37: ...34 40QZL018DS 40QZL024DS 40QZL036DS...
Page 38: ...35 40QZL048DS 40QZL060DS...
Page 40: ...37 6 2 Outdoor Unit 38QUA018DS 38QUA024DS...
Page 41: ...38 38QUA036DS...
Page 42: ...39 38QUA048DS 38QUA060DS...
Page 44: ...41 40QSM018DS Code 0 Code 1 Code 2 Code 3 Code 4...
Page 45: ...42 40QSM024DS Code 0 Code 1 Code 2 Code 3 Code 4...
Page 46: ...43 40QSM036DS Code 0 Code 1 Code 2 Code 3 Code 4...
Page 47: ...44 40QSM048DS Code 0 Code 1 Code 2 Code 3 Code 4...
Page 60: ...57 12 Field Wiring 18K 24K 36K 48K...
Page 61: ...58 60K...
Page 104: ...101 P U P V...
Page 105: ...102 P W P N...