Mitsubishi Electric PURY-HP144, Service Handbook

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[8-13 Parts Replacement Instructions ]
HWE18220_GB chapter 8 -
73
8 Troubleshooting Based on Observed Symptoms
8-13-4 Replacement Procedure for the Check Valve Block Assembly
Figure 1
Figure 4
Figure 6-1
Figure 6-2 (Four-way valve, solenoid valve, LEV coil, coil cover)
Figure 6-3 (adjacent pipe covers)
Figure 2
Figure 3
Explained below is the procedure for replacing the check valve block assembly.
(1) Remove the top compressor cover by unscrewing the three screws. (See Figure 1.)
Remove the compressor cover by unhooking the hooks on the back.
(2) Remove the front compressor covers by unscrewing the four screws. (See Figure 2.)
(3) Cut the two tie bands holding TH4 and TH15, and remove the wiring from the rubber bush on the left compressor cover.
(See Figure 3.)
(4) Remove the left compressor cover by unscrewing the two screws. (See Figure 4.)
(5) Remove the saddle and the rubber spacers on the compressor by unscrewing the screw. (See Figure 5.)
(6) Remove the coils, coil covers, pipe covers, and adjacent wirings of the four-way valves, solenoid valves, and LEVs. (See
Figures 6-1 through 6-3.)
Compressor cover (top)
Compressor cover (front)
Four-way valve coil (21S4a)
LEV coil
(LEV2a)
LEV coil
(LEV2b)
LEV coil
(LEV9)
Four-way valve coil (21S4b)
Solenoid
valve coil
(SV2)
LEV coil
(LEV2d)
Remove the adjacent pipe
covers.
*Save the pipe covers for
later use.
Rubber bush
Cable tie
TH15
TH4
Compressor
cover (left)
Figure 5
Rubber spacers
(2 pieces)
Screw to be
removed
Saddle