151
CONTROL
Ignition coil
To generate high voltage necessary for the
spark plugs
Rated: 12 V DC
IGN1: CN8[1]-[3]
IGN2: CN8[2]-[3]
IGN3: CN8[7]-[3]
IGN4※2: CN8[8]-[3]
Exhaust water
drain heater
(unit with drain
heater kit only)
To turn ON to prevent freezing of exhaust
water drain filter and exhaust water drain
hose depending on outside air temperature
Rated : 200 V AC
Cold district PCB
DH: CN3[1]-[4]
Engine oil pan
heater
(unit with drain
heater kit only)
To turn ON to prevent engine oil from being
too viscous
Rated : 200 V AC
Cold district PCB
E/G OPH: CN3[2]-[5]
Engine coolant
temperature
sensor
1. Judgment of abnormal engine coolant tem-
perature
2. Abnormal engine coolant temperature
avoidance control
3. Preventive control for engine operation
without engine coolant
4. Outdoor fan air volume control
5. Detection of disconnection or short circuit
Refer to P177 and af-
ter, [Parts Character-
istics].
WT: CN6[11]-[12]
Engine coolant
pump
To circulate the engine coolant
Rated: 280 V DC
DC brushless
DCBL PCB
WP: CN9[1]-[2]-[3]
Compressor
discharge pipe
temperature
sensor
1. Detection of disconnection judgment tem-
perature (detection of lower than 34℉(1℃)
for 10 minutes)
2. Detention od short circuit judgement tem-
perature (detection of 248 ℉ (120 ℃ ) or
higher for 1 minute)
Refer to P177 and af-
ter, [Parts Character-
istics].
C/P T1: CN4[27]-[28]
C/P T2: CN4[25]-[26]
Compressor
intake tempera-
ture sensor
1. Abnormal compressor intake temperature
avoidance control
2. Detection of disconnection or short circuit
C/P S: CN4[23]-[24]
Accumulator
outlet tempera-
ture sensor
1. Subcooling valve control
2. Detection of disconnection or short circuit AOT: CN4[13]-[14]
Sub heat
exchanger
liquid tempera-
ture sensor
1. Sub heat exchanger liquid flow control
valve control
2. Detection of disconnection or short circuit
SOT: CN4[15]-[16]
Outdoor liquid
pipe tempera-
ture sensor
1. Subcooling valve control
2. Detection of disconnection or short circuit ILT: CN4[29]-[30]
Outdoor heat
exchanger
liquid tempera-
ture sensor
1. Subcooling valve control
2. Detection of disconnection or short circuit
3. Sub heat exchanger liquid flow control
valve control
THL: CN4[19]-[20]
Name Functions Specifications Connector No.
NOTE) Numbers in [ ] in the "connector No." column correspond with the pin numbers shown in circles in the wiring diagram.
※1. 8 TON only
※2. 15 TON only
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