[8-15 Main-HBC Maintenance Instructions ]
8-15-13
4-way Valve Body (21S4) Replacement Procedure (HBC)
Operation procedures
«Note»
Protect the insulation materials in the pe-
riphery of the area to be brazed.
Replace the entire four-way valve assembly
when only the four-way valve on one side
needs replacement.
1) Remove the service panel (lower panel).
2) Collect the refrigerant.
3) Disconnect all connectors from the con-
trol box except the connectors of the on-
site wiring, and open the control box.
4) Remove the pipe covers shown in the
figure at right.
5) Remove LEV3, SV1, and four-way valve
coils.
See sections [8-15-1 Solenoid Valve
Coil (SV1) Replacement Procedure
(HBC)] through [8-15-3 LEV Coils
(LEV1, LEV2, LEV3) Replacement Pro-
cedure (HBC)] for details about the re-
moval procedure.
6) Remove the braze from the areas
shown in the figure at right, and remove
the SV1 ASSY.
7) Remove the clamps and the rubber
packing holding the four-way valve AS-
SY. (x2)
164
- chapter 8
Illustrations
Four-way valve ASSY
Pipe covers
Remove the braze.
Remove the braze.
Operation
location
Installation
location
Pipe covers
SV1 ASSY
BS_08_L