Four-Way Valve Removal - Pioneer QUANTUM INVERTER Series Service & Troubleshooting Manual

3.5

Four-Way Valve Removal

WARNING: Evacuate the system and confirm that there is no refrigerant left in the system before removing the
four-way valve and the compressor. (The operation below should be performed by professionals.)
(For R32/R290 systems, evacuate the system with the vacuum pump, flush the system with nitrogen, and repeat those two steps prior to heating up the brazed parts.)
Note: Remove the panel plate, connection of four-way valve on PCB (refer to 3.1 Panel Plate Disassembly and
3.2 Electrical Components Disassembly), and insulation blanket, prior to disassembling the four-way valve.
Procedure
1) Heat up the brazed parts and then detach
the four-way valve and the pipe (see
Fig. 1).
2) Remove the four-way valve assembly
by using pliers.
Note: This section is for reference only. Actual unit appearance may vary.
Illustration
Outdoor Unit Disassembly

Figure 1
23