Mitsubishi Electric PU(H)Y-P250YGM-A, Service Handbook

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[
IV
Indoor Unit Components ]
Caution
To put the top and bottom sections of the unit together, follow the procedures above in the reverse order.
Use a hand-lift truck to transport the units; they are heavy even when the top and button sections are separated.
Carrying the units by hand is dangerous and may result in personal injury if the units fall or topple over.
Exercise caution not to get your fingers caught when separating or assembling the top and bottom sections of
the unit.
Check to make sure that the frame is perpendicular to the horizontal plane before putting the panels together.
When the frames will not fit back into place, loosen bolt 2 as shown in [Fig.1], place the frames, and tighten bolt 2 .
Keep torch flame away from the insulation material on the drain pan and from other flammable materials when
performing brazing work. Use the shielding board that is supplied.
Be sure to securely tighten all screws and bolts. (tightening torque: 74N.m)
Perform a test run and check for abnormal sound, rattling, and water leaks.
Using [Fig.4] and Table 1 as a reference, connect all connectors correctly.
Use a cable tie and bundle the wires as they were before.
<Model 250>
No. 1 board
Connector location on the board
CN60
CN31
CN20
CN21
CN29
CN22
Connector location on the board Connector location on the adapter board
No. 1 board
CN31
CN20
CN21
CN29
*Same with the No. 2 board
LEV2B
LEV2A
<Model 500>
Board No.
No.1
Connector
CN31
CN20
CN21
CN29
CN60
Table 1
Table 1
Wire
mark
1
S1
E1
G1
V1
Connector
color
White
Red
White
Black
White
No. of
pins
3
2
2
2
6
Parts name
Float switch
Inlet thermistor
Liquid pipe thermistor
Gas pipe thermistor
Linear expansion valve
Board No.
No.1
No.2
Connector
CN31
CN20
CN21
CN29
LEV2A
CN31
CN20
CN21
CN29
LEV2B
Wire
mark
1
S1
E1
G1
V1
2
S2
E2
G2
V2
Connector
color
White
Red
White
Black
White
White
Red
White
Black
White
No. of
pins
3
2
2
2
6
3
2
2
2
6
Parts name
Float switch
Inlet thermistor
Liquid pipe thermistor
Gas pipe thermistor
Linear expansion valve
Float switch
Inlet thermistor
Liquid pipe thermistor
Gas pipe thermistor
Linear expansion valve
[Fig. 4]
[Fig. 4]