Mitsubishi Electric PUHY-HP120TNU-A, Service Handbook

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[8-12 Parts Replacement Instructions ]
58
- chapter 8 HWE18240_GB
8 Troubleshooting Based on Observed Symptoms
(17A) Mount four-way valve (21S4a) to the pipe below four-way valve A and in the middle by brazing at the three areas. (See
Figure 17.)
(18A) Mount four-way valve (21S4a) to the pipe below four-way valve (21S4a) and on the front by brazing at the four areas.
(See Figure 18.)
This step completes the replacement procedure for four-way valve (21S4a). Re-place the solenoid valve and LEV assembly
that were removed in step (7) and all the pipe covers that were removed during the maintenance work as they were.
Figure 17
Reinstall these pipes.
Re-place the rubber spacer.
Figure 18