Purging Procedures, Leak Test, And Test Run; Auto Restart Function - Mitsubishi Electric MSZ-AS90VGD Installation Manual

4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN

4-1. PURGING PROCEDURES AND LEAK TEST
1) Remove service port cap of stop valve on the side of the outdoor unit gas pipe. (The stop
valves are fully closed and covered in caps in initial state.)
2) Connect gauge manifold valve and vacuum pump to service port of stop valve on the
gas pipe side of the outdoor unit.
*4 to 5 turns
Stop valve cap
*Close
29.4 N•m, 200
*Open
Hexagonal wrench
Service port cap
17.7 N•m, 140 to
•cm)
Precautions when using the control valve
<R32>
A
Open
Body
Close
Control
replace the cap after
valve
the operation.
3) Run the vacuum pump. (Vacuumize until 500 microns is achieved.)
the vacuum pump.
mmHg).
before opening the stop valves.
7) After refrigerant pipes are connected and evacuated, fully open all stop valves on both
and this causes trouble.
8) Refer to 1-3., and charge the prescribed amount of refrigerant if needed. Be sure to charge
be changed and affect performance of the air conditioner.
9) Tighten cap of service port to obtain the initial status.
Compound pressure gauge
–
0.101 MPa
(for R32, R410A)
–
( 760 mmHg)
Pressure gauge
(for R32, R410A)
Stop valve
for LIQUID
Gauge manifold valve
(for R32, R410A)
Handle
Low
Handle High
Charge hose
Stop valve for
(for R32, R410A)
GAS
Adapter for
preventing the
Vacuum pump (or the vacuum
pump with the function to
When attaching the control valve
to the service port, valve core may
deform or loosen if excess pressure
When attaching the control valve to
Service port
valve core is in closed position, and
then tighten part A. Do not tighten
part A or turn the body when valve
Charge
core is in open position.
hose
WARNING
4-2. TEST RUN
1) Insert power supply plug into the power outlet and/or turn
2) Press the E.O. SW once for COOL, and twice for HEAT
operation. Test run will be performed for 30 minutes. If the
seconds, inspect the indoor/outdoor unit connecting wire
(A) for mis-wiring. After the test run, emergency mode (set
temperature 24ºC) will start.
3) To stop operation, press the E.O. SW several times until
all LED lamps turn off. Refer to operating instructions for
details.
Checking the remote (infrared) signal reception
is heard from the indoor unit. Press the OFF/ON button again to turn the air conditioner off.
• Once the compressor stops, the restart preventive device operates so the compressor
will not operate for 3 minutes to protect the air conditioner.

4-3. AUTO RESTART FUNCTION

the previous setting once the power supply is resumed. (Refer to the operating instruc-
tions for details.)
Caution:
the remote controller before turning off the power supply. Not doing so will cause the
unit to start operation automatically when power supply is resumed.
To the user
• If auto restart function is unnecessary, it can be deactivated. Consult the service
representative to deactivate the function. Refer to the service manual for details.
4-4. EXPLANATION TO THE USER
• Using the OPERATING INSTRUCTIONS, explain to the user how to use the air condi-
put the remote controller in the remote controller holder, how to clean, precautions for
operation, etc.).
• Recommend the user to read the OPERATING INSTRUCTIONS carefully.
Emergency operation switch
(E.O. SW)