Toshiba MMY-MAP0724HT6UL, Service Manual

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217
10 4-way valve
- detachment/
attachment
(continued)
096 type
114 type 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 (3 pieces) and get all wiring located
near the 4-way valve out of the way.
4) Remove brazed points (3 locations) for the
PMV assembly, which is placed in front of
the 4-way valve.
* Provide adequate cover for the PMV proper
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.
No. Part to be replaced Work procedure Remarks
PMV
4) Brazed point
4) Brazed point
7) End sections of pipes (3 pieces)
5) Cutting
line
4-way valve
6) Brazed point
Cutting through of
pipes located above 4-
way valve (3 pieces)
Removing of brazed point on left
side of strainer (1 location)
Removing of brazed point
at back of PMV (1 location)
Before Removal of PMV Assembly
4-way valve
proper
Removing of brazed point
for pipe located below
4-way valve (1 location)
After Removal of PMV Assembly
PMV assembly