Signature Kitchen Suite UPSXB2627S, Руководство по обслуживанию

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TROUBLE DIAGNOSIS
1. Cooling Cycle Heavy Repair
1-1. The Heavy Repair Standards for Refrigerator with R134a Refrigerant
NO. Items Unit Standards Purposes Remarks
1 Pipe and piping system
opening time.
Min. Pipe:within 1 hour.
Comp: within
10 minutes.
Drier: within
20 minutes.
To protect
Moisture
Penetration.
The opening time should be reduced
to a half of the standards during rain
and rainy seasons (the penetration of
water into the pipe is dangerous).
2 Welding. Nitrogen
Pressure.
Weld under Nitrogen
atmosphere
(N2 pressure: 0.1~0.2
kg/cm2 )
To protect
oxide scale
formation.
- Refet to repair note in each part.
- R134a refrigerant is more
susceptible to leaks than R12 and
requires more care during welding.
- Do not apply force to pipes before
and after welding to protect pipe
from cracking.
3 N2 sealed parts. Confirm
N2 leak.
Confirm air leaking
sounds when removing
rubber cap.
Sound:usable
No sound:not usable
To protect
moisture
penetration.
- In case of evaporator parts, if it
doesn’t noise when removing rubber
cap blow dry air or N 2 gas for more
than 1 min use the parts.
4 Refrigeration
Cycle.
Evacuation
time
Min.
More than 40 minutes.
To remove
moisture.
Note: Only applicable to the model equipped
with reverse flow protect plate.
5 Refrigerant weighing. EA Use R134a exclusively.
Weighing
allowance: –5g
Note: Winter: -5g
Summer: +5g
Do not mix
with R12
refrigerant.
- Do not weigh the refrigerant at too
hot or too cold an area. (25¡C [77¡F]
is adequate.)
- Use copper charging canister
Socket:2SV Plug: 2PV R134a
Note : Do not burn O-ring (rubber)
during welding.
- Check oil leak at refrigerant leak area.
Use electronic leak detector if oil leak is not
found.
- The electronic leak detector is very
sensitive to halogen gas in the air. It also
can detect R141b in urethane. Please
practice, therefore, many times before use.
6 Drier replacement. - Use R134a exclusively
for R134a refrigerator
- Use R12 exclusively for
R12 refrigerator
- Replace drier
whenever repairing
refrigerator cycle
piping.
To remove
the moisture
from pipe.
7 Leak check. - Do not use soapy
water for check.
It may be sucked into
the pipe.
Detect
refrigerant
leak area.
Vacuum
degree
Torr Below 0.03 (ref)
Vaccum efficiency can be improved by
operating compressor during evacuation.
Vacuum EA High and low Pressure
sides are evacuated at
the same time for
models above 200
ℓ
The bushing pipes for R12 refrigerant will
be melted when they are used for R134a
refrigerant causes of leak.
Vacuum
piping
EA Use R134a exclusive
manifold.
To protect
mixing of
mineral and
ester oils.
Pipe
coupler
EA Use R134a cxclusive. To protect
R12
Refrigerant
mixing.
Outlet
(Socket)
R134a exclusive.
Plug R134a exclusive.