Servicing - Mitsubishi Heavy Industries SRK10CFV-4 Technical Manual & Parts List

(6) How to make sure of remote control
(1)
NO
Is remote
control
normal?
YES
Again pushing
operating switch
YES
Operating the
unit?
NO
Does operating Unit
ON/OFF button
Operating the unit?
NO
YES
Replace the
display
Operating the
YES
unit by remote
control?
NO
Remote control
defects

6.2 Servicing

(1) Evacuation
The evacuation is an procedure to purge impurities ...... noncondensable gas, air, moisture from the refrigerant equipment by using
a vacuum pump. Since the refrigerant R22 is very insoluble in water, even a small amount of moisture left in the refrigerant
equipment will freeze, causing what is called water clogging.
¡ Evacuation procedure
(a) Check to ensure that there is no internal pressure in the unit. If there is an internal pressure, it
should be relieved through the check joint.
(b) Connect the service hoses of the gauge manifold to the check joint of the gas & liquid piping.
Connect a vacuum pump to the charge hose A. Repeat evacuation in the following sequence.
(c)
Start the vacuum pump
Operate the vacuum pump for more than 15 minutes after –0.1MPa
(–76 cmHg) is indicated.
Close low pressure valve 1 of gauge manifold.
Stop the vacuum pump.
Notes (1) Do not use the refrigerant pressure to expel air.
(2) Do not use the compressor for evacuation.
(3) Do not operate the compressor in the vacuum condition.
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Note (1) How to check the remote control.
Remote control
defects
Abnormal is not
fount
Control unit defects
It is normal
30
-
(a) Press the reset switch of remote control.
(b) If the almost normal if entire display of remote control is shown after 1
indication.
Check joint
Service hose
Charge hose
Vacuum
pump
-
Liquid side
Gas side
Gauge
manifold
Refrigerant
cylinder