Purging Procedures, Leak Test, And Test Run; Auto Restart Function - Mitsubishi Electric MSZ-AP22VG(K)D 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
(Torque 19.6 to
*Close
*Open
Hexagonal wrench
Service port cap
(Torque 13.7 to
140 to
180 kgf cm)
Precautions when using the control valve
<R32>
A
Open
Make sure to re-
Close
Control
place the cap after
valve
the operation.
3) Run the vacuum pump. (Vacuumize until 500 microns is achieved.)
4) Check the vacuum with gauge manifold valve, then close gauge manifold valve, and stop
the vacuum pump.
5) Leave as it is for one or two minutes. Make sure pointer gauge manifold valve remains
mmHg).
6) Remove gauge manifold valve quickly from service port of stop valve.
risks before opening the stop valves.
7) After refrigerant pipes are connected and evacuated, fully open all stop valves on both
sides of gas pipe and liquid pipe. Operating without fully opening lowers the performance
and this causes trouble.
slowly with liquid refrigerant. Otherwise, composition of the refrigerant in the system may
be changed and affect performance of the air conditioner.
9) Tighten cap of service port to obtain the initial status.
10) Leak test
Compound pressure gauge
–
0.101 MPa
(for R32, R410A)
–
( 760 mmHg)
Pressure gauge
(for R32, R410A)
Stop valve
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
is applied. This may cause gas leak.
When attaching the control valve to
Service port the service port, make sure that the
valve core is in closed position, and
part A or turn the body when valve
Charge
hose
core is in open position.
WARNING
4-2. TEST RUN
1) Insert power supply plug into the power outlet and/or turn on the
breaker.
2) Press the E.O. SW once for COOL, and twice for HEAT operation.
Test run will be performed for 30 minutes. If the upper lamp of the
operation indicator blinks every 0.5 seconds, inspect the indoor/
outdoor unit connecting wire (A) for mis-wiring. After the test run,
emergency mode (set temperature 24ºC) will start.
lamps turn off. Refer to operating instructions for details.
4) Checking the remote (infrared) signal reception
check that an electronic sound is heard from the indoor unit.
Press the OFF/ON button again to turn the air conditioner off.
operates so the compressor will not operate for 3 minutes to
protect the air conditioner.

4-3. AUTO RESTART FUNCTION

This product is equipped with an auto restart function. When the power supply is stopped
during operation, such as during blackouts, the function automatically starts operation in
the previous setting once the power supply is resumed. (Refer to the operating instructions
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
representative to deactivate the function. Refer to the service manual for details.
4-4. EXPLANATION TO THE USER
for operation, etc.).
Emergency operation
switch (E.O. SW)