Mitsubishi Electric PUHZ-HRP71VHA Service Manual page 127

PUHZ-HRP100YHA
PUHZ-HRP125YHA
OPERATING PROCEDURE
1. Removing the service panel and top panel
(1) Remove the service panel fixing screws (3 for front, 5 × 12)
and slide the hook on the right downward to remove the
service panel.
(2) Remove the top panel fixing screws (3 for front, 3 for rear,
5 × 12) to detach the top panel.
2. Removing the fan motor (MF1, MF2)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove the fan grille fixing screws (5 for front, 5 × 12) to
detach the fan grille. (Top and bottom) (See Figure 1)
(4) Remove a nut (for right handed screw of M6) to detach the
propeller. (Top and bottom) (See Photo 1)
(5) Disconnect the connectors, CNF1 and CNF2 on controller
circuit board in electrical parts box.
(6) Disconnect the lead wire from 3 clamps on the separator.
(7) Remove the fan motor fixing screws (4 for front, 5 × 25) to
detach the fan motor. (Top and bottom) (See Photo 2)
3. Removing the electrical parts box
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Disconnect the indoor/outdoor connecting wire and power
supply wire from terminal block.
(4) Disconnect the connector CNF1, CNF2, LEV-A, LEV-B and
LEV-C on the controller circuit board.
<Symbols on the board>
• CNF1, CNF2 : Fan motor
• LEV-A, LEV-B, LEV-C: LEV
(5) Disconnect the pipe-side connections of the following parts.
• Thermistor <Liquid>(TH3)
• Thermistor <Discharge>(TH4)
• Thermistor <Outdoor 2-phase pipe>(TH6)
• Thermistor <Ambient>(TH7)
• Thermistor <Suction>(TH32)
• Thermistor <Ref. check>(TH33)
• High pressure switch (63H)
• Low pressure switch (63L)
• High pressure sensor (63HS) *Only for YHA2(R1)
• 4-way valve coil (21S4)
(6) Disconnect 3 lead wires from the clamp on the separator.
(7) Remove the terminal cover and disconnect the lead wire of
the compressor. (See Figure 2)
(8) Remove the electrical parts box fixing screw (2 for front,
4 × 10) and detach the electrical parts box by pulling it
upward. The electrical parts box is fixed with 2 hooks on
the left and 1 hook on the right.
OCH425F
PUHZ-HRP100YHA2
PUHZ-HRP125YHA2
127
PUHZ-HRP100YHA2R1
PUHZ-HRP125YHA2R1
PHOTOS & ILLUSTRATION
Figure 1 (PUHZ-HRP100/125YHA)
Top panel fixing screws
Grille
fixing
screws
Grille
fixing
screws
Photo 1
Front panel
Propeller
Nut
Photo 3
Controller circuit
Noise filter circuit
board (C.B.)
board (N.F.)
Terminal block (TB1)
Top panel
Service panel
Slide
Fan grille
Service panel
fixing screws
Photo 2
Fan
Fan motor fixing screws motor
Fan motor fixing screws
Electrical parts box
Electrical
parts box
fixing screw
Terminal block (TB2)