– 68 –
<Other points to note>
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 140°F (60°C), the frequency may be
increased above the level called for by the commandreceived 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.
<Schematic diagram for oil equation control>
SV41
SV3C
Check joint
(Liquid)
HP
SW
Low pressure
sensor
TS2
TL
High pressure sensor
Accumulator
SV2
SV3D
Liquid
tank
SV43
SV6
Oil
separator
SV5
SV42
SV41
SV42
Accumulator
Low
pressure
TS2
FP
Oil header
SV
SV
SV
SV
SV
SV
SV
SV
SV
SV
SV
SV3C
SV
SV
SV
SV
SV
SV
SV
SV
SV
SV
SV
SV
FP
SV
SV
TS1
PMV1
Unit
transferring oil
TE1
PMV2
PMV4
TE2
TO
SV11
Header unit (MMY-MAP0964FT
∗
)
Follower unit (MMY-MAP0724FT
∗
)
SV3B
SV3A
TD1
TK4
SV3E
TK5
TD3
HP
SW
TK3
SV3F
Comp.
1
TD2
HP
SW
TK2
TK1
HP
SW
FM
FM
TS1
PMV1
4-way
valve
TE1
PMV2
PMV4
TE2
TO
SV11
TL
High pressure sensor
SV2
SV3D
Liquid tank
SV6
Oil
separator
SV5
TD1
TK4
SV3E
TK5
TD2
TK2
TK1
HP
SW
SV3A
SV3B
Balance pipe
Liquid pipe
Dischage gas pipe
Suction Gas pipe
SV
SV1
SV
SV1
FP
FP
4-way
valve
Comp.
2
Comp.
3
Comp.
2
Comp.
1
Unit
receiving oil
Summary of Contents for MMY-MAP0724FT6UL
Page 35: ...35 3 5 Parts Layout in Outdoor Unit 072 type Model MMY MAP0724FT...
Page 36: ...36 096 120 type Model MMY MAP0964FT MAP1204FT...
Page 37: ...37 3 6 Parts Layout in Inverter Assembly 208 230V model MMY MAP0724FT9UL...
Page 38: ...38 208 230V model MMY MAP0964FT9UL MMY MAP1204FT9UL...
Page 39: ...39 460V model MMY MAP0724FT6UL...
Page 40: ...40 460V model MMY MAP0964FT6UL MMY MAP1204FT6UL...
Page 41: ...41 3 7 Outdoor Inverter print circuit board 3 7 1 Interface P C board MCC 1606...
Page 42: ...42 3 7 2 Inverter P C board for compressor MCC 1595 A3 IPDU For 208 230V model MMY MAP 4FT9UL...
Page 43: ...43 3 7 3 Inverter P C board for compressor MCC 1596 A3 IPDU For 460V model MMY MAP 4FT6UL...
Page 44: ...44 3 7 4 Inverter P C board for fan motor MCC 1610 FAN IPDU...
Page 45: ...45 3 7 5 Noise Filter P C board MCC 1608 A B For 208 230V model MMY MAP 4FT9UL...
Page 46: ...46 3 7 6 Noise Filter P C board MCC 1625 A B C For 460V model MMY MAP 4FT6UL...
Page 195: ...195...
Page 197: ...197...
Page 257: ...257 15 EXPLODED DIAGRAM PARTS LIST Outdoor unit 15 1 MMY MAP0724FT9UL...
Page 258: ...258 15 1 MMY MAP0724FT9UL...
Page 262: ...262 15 1 Inverter Assembly MMY MAP0724FT9UL...
Page 264: ...264 15 2 MMY MAP0964FT9UL MMY MAP1204FT9UL...
Page 265: ...265 15 2 MMY MAP0964FT9UL MMY MAP1204FT9UL...
Page 269: ...269 15 2 Inverter Assembly MMY MAP0964FT9UL MMY MAP1204FT9UL...
Page 271: ...271 15 3 MMY MAP0724FT6UL...
Page 272: ...272 15 3 MMY MAP0724FT6UL...
Page 276: ...276 15 3 Inverter Assembly MMY MAP0724FT6UL...
Page 278: ...278 15 4 MMY MAP0964FT6UL MMY MAP1204FT6UL...
Page 279: ...279 15 4 MMY MAP0964FT6UL MMY MAP1204FT6UL...
Page 283: ...283 15 4 Inverter Assembly MMY MAP0964FT6UL MMY MAP1204FT6UL...