MULTI TYPE

1 Cooling operation under low outside temperature conditions
1) If pressure falls to extremely low levels, indoor units may be shut down via freeze prevention control based
on the indoor TC sensor.
2) If pressure falls to extremely low levels, frequency may be reduced via cooling capacity control.
3) When the discharge temperature sensor reading falls below 60°C, the frequency may be increased above
the level called for by the command received from the indoor unit.
2 PMV (Pulse Motor Valve)
1) When the power is turned on, PMVs generate a tapping sound as they are initialized. If this sound is not
heard, there is a possibility of faulty PMV operation. However, in a noisy environment, it may simply be
drowned out by ambient noise.
2) Do not separate the actuator (head section) from any PMV during operation. It may result in an inaccurate
opening.
3) When transporting (relocating) the set, do not, under any circumstances, keep the actuator separated. It
may damage the valve by causing it to close and exposing it to pressure from sealed liquid.
4) When reattaching the actuator after its removal, push it in firmly until a click sound is heard. Then, turn the
power off and back on again.
Unit
transferring oil
Header unit (MMY-MAP1604*)
Unit
receiving oil
Follower unit (MMY-MAP1204*)
FM
FM
TO
TO
PMV1
PMV2
PMV4
TE2
TE1
TE1
SV
4-way valve
PMV2
PMV1
SV5
4-way valve
High pressure sensor
SV6
SV
TS1
High pressure sensor
TS1
Low pressure sensor
SV
TL
SV
TL
SVD3
SV
O.S.
SV2
Low pressure sensor
SV3D
SV
O.S.
SV2
SV41
SV SV41
SV SV42
Liquid tank
SV
TD1
SV
ON
SV42
SV3C
HPS HPS TD2
HPS
SV
SV Accumulator
SV43
TD3
Liquid tank
TD1
HPS
SV3C
SV
HPS
TD2
Accumulator
Compressor
1
TK
Compressor
2 Compressor
3
Compressor A3
1
TK4 Compressor
2
TK1
TK2
TK1
TK2
TK3
SV3
SV
TK5
SV
TK5
SV3E
SV
SV3F
SV3A
SV
SV
SV3B
ON
SV3A
ON
SV
SV
SV3B
Balance pipe
Liquid pipe
Gas pipe
84