Mitsubishi Electric PU-P1.6VGA, Technical & Service Manual

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9 DISASSEMBLY PROCEDURE
OPERATING PROCEDURE PHOTOS
PUH-P5/6YGA
1. Removing the Service panel and Top panel
(1) Remove the 3 service panel fixing screws (5
✕
15) and
slide the hook to remove the service panel.
(2) Remove the screws (3 for front, 2 for rear/5
✕
15) of the
top panel and remove it.
<When the rear screws of the top panel are not possible
to remove>
Remove the 3 front screws (5
✕
15) of the top panel and
lift the front side of the top panel.
Photo 1
Top panel screws
Top panel
Service panel
screws
Service panel
Fan guard screws
Fan guard
2. Removing the Fan and Fan motor
(1) Remove the 6 fan guard screws (5
✕
15) to remove it.
(See Photo 1)
(2) Remove the propeller nut (M8) and propeller fan.
(3) Remove the 3 fan motor screws (5
✕
25) to remove the
fan motor.
Fan motor screws
Fan motor
Photo 3
3. Removing the Electrical box
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the Bypass valve, Crankcase heater, Pressure
switch<for high pressure>, Pressure switch <for low
pressure>, Liquid temperature thermistor, Discharge
temperature thermistor, condenser/evaporator temperature
thermistor and 4-way valve from the connector housing on
the controller board,then disconnect the fan motor lead wire
from the housing mentioned before and the condenser lead
wire for the fan from the electrical box.
<Diagram symbol in the connector housing>
Bypass valve solenoid coil (SV) · Crankcase heater (CH)
Pressure switch <for high pressure> (63H)
Pressure switch <for low pressure> (63L)
Liquid temperature thermistor (TH3)
Discharge temperature thermistor (TH4)
Condenser/evaporator temperature thermistor (TH6)
R.V. coil (21S4) · Fan motor (MF3, MF4)
(4) Remove the terminal cover and disconnect the compressor
lead wire and inner thermal device terminal.
(5) Remove the electrical box screw (4
✕
10) and lift the
box to remove it. The electric box cover is hooked at 2
points on the left and 1 point on the right.
Fan guard Electric parts box
Outdoor unit
controller board
Electrical box
fixing screw
Terminal cover
Cover panel
Cover panel fixing screw Compressor
Photo 2
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