10-3.Work procedure after Repair
When vacuuming in the repaired outdoor unit, follow the procedure described below.
<Work procedure>
(1) Fully open PMV1 and 2 and PMV4 (MMY-MAP1404
and MAP1604
only) in accordance with the table below.
Note: PMV full-opening operation via short-circuiting of the CN30 pins is automatically undone after 2 minutes,
causing the valves to fully close. To maintain fully open state, turn off the power switch of the outdoor unit
within 2 minutes of the short-circuiting of the CN30 pins.
(2) Be sure to perform vacuuming in from the three check joints shown in the diagram below (liquid pipe, discharge
pipe and suction pipe).
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SW12
Bit 1
Bit 2
Bit 3
Bit 4
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
PMV1
PMV2
(TE1)
PMV4
(TE2)
High-pressure sensor
(TL)
(SV3D)
Fusible
plug
Liquid tank
(SV3A)
Check valve
Liquid-side
Gas-side
Balance pipe
service valve
service valve
packed valve
manuals search engine
CN30
Short-circuit
PMV1 and 2 fully open for 2 minutes.
Short-circuit
PMV4 fully opens for 2 minutes.
M
Fan motor
Right-side
Main heat exchanger
Right-side sub-heat exchanger
Left-side
Main heat exchanger
Left-side sub-heat exchanger
(SV6)
SV
SV
(SV2)
Oil separator
SV
(SV41)
SV
SV
(SV42)
High-
(SV3C)
High-
(TD1)
pressure
(TD2)
pressure
SW
SW
(TK4)
Compressor
Compressor
1
2
(Inverter)
(Inverter)
(TK2)
(TK1)
Oil pipe
(TK5)
(SV3E)
(SV3F)
SV
254
PMV operation
Fan
(TO)
Check valve
Check valve
4-way valve
(TS1)
Low-pressure sensor
Accumulator
SV
(SV43)
High-
(TD3)
pressure
SW
Compressor
3
(Inverter)
(TK3)
(SV3B)
SV
Check valve