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9
4-way valve
- detachment/
attachment
MAP0804
MAP1004
MAP1204
WARNING
Wear a pair of gloves.
Otherwise, you will risk an injury involving a
replacement part or some other object.
Before starting the work, be sure to recover the
refrigerant of outdoor unit by removing it with a
refrigerant recovery device.
1. Detachment
1) Remove the lower cabinet (front side).
2) Remove the inverter box in accordance with the
dismantling instructions.
3) Disconnect the 4-way valve coil and PMV coils (2
pieces) and get all wiring located near the 4-way
valve out of the way.
4) Remove brazed points (2 locations) for the PMV
assembly, which is placed in front of the 4-way
valve.
* Provide adequate cover for the PMV to protect it
from overheating.
5) Since it is difficult to simultaneously remove the
brazed points for the pipes located above the 4-
way valve (3 pieces), cut through them just below
the brazed points using a saw, etc.
6) Detach the pipe located below the 4-way valve.
7) Remove the end sections of the pipes above the
4-way valve, which were cut in step 5).
8) Install a new 4-way valve.
* Provide adequate cover for the 4-way valve to
protect it from overheating. During the installation,
insert pipes firmly into the 4-way valve, or a
blockage or leakage involving brazing filler metal
may result.
9) Reinstall the PMV assembly, which was removed
in step 4).
* Provide adequate cover for the PMV to protect it
from overheating.
10) Reinstall all the coils removed in step 3), and put
the wiring back to its initial state.
11) Reinstall the inverter box in accordance with the
installation instructions.
12) Reinstall the lower cabinet.
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7) End sections of pipes (3 pieces)
PMV
4) Brazed point
4) Brazed point
6) Brazed point
4-way valve
5) Cutting
line
Before Removal of PMV Assembly
After Removal of PMV Assembly
PMV assembly
Removing of brazed point on
left side of strainer (1 location)
Cutting through of
pipes located above
4-way valve (3 pieces)
4-way valve
proper
Removing of brazed point at
back of PMV (1 location)
Removing of brazed point
for pipe located below
4-way valve (1 location)
Summary of Contents for MMY-MAP0804HT7JP
Page 23: ... 22 1 Wiring Diagrams 1 1 Outdoor Unit Models MMY MAP0804 MAP1004 and MAP1204 ...
Page 24: ... 23 Models MMY MAP1404 and MAP1604 ...
Page 35: ... 34 1 2 10 Slim Duct Type AP024 AP027 Models MMD AP0244SPH MMD AP0274SPH ...
Page 38: ... 37 1 2 13 High Wall Type 3 series Models MMK AP0073H AP0093H AP0123H AP0153H AP0183H AP0243H ...
Page 52: ... 51 2 5 Parts Layout in Outdoor Unit 8 10 12HP Model MMY MAP0804 MAP1004 MAP1204 ...
Page 53: ... 52 14 16HP Model MMY MAP1404 MAP1604 ...
Page 57: ... 56 2 7 2 Inverter P C board for compressor MCC 1596 A3 IPDU ...
Page 323: ......
