– 62 –
(c) Controller inspecting procedure
∗
1: For other voltage than 0.5V, refer to TH (storage
temperature sensor) conversion table (P.63).
∗
2: For other voltage than 0.5V, refer to TD (Td sensor)
conversion table (P.63).
∗
3:
Note: 1) Car battery supply means that ignition switch is on.
2) AC power supply means that commercial power is
supplied from AC plug.
3) Unit operation means that car battery or AC power
supply unit are on.
• Measure voltage between ground (terminal 20) and
measured terminal.
• Though commercially available tester is applicable for
check, use the tester whose tester rod is cut to sharp.
(Approx. 1mm dia.)
Output relay names
Power supply line breakage
0V
Short circuit from pin
M
Normal: 24V
}
Power supply line breakage
0V
Short circuit from pin
NO
Normal: Battery voltage
}
Fuse line breakage: 0V
Normal time: Battery voltage
Relay ON : 0V
Relay OFF: Battery voltage
Relay ON : 0V
Relay OFF: Battery voltage
Relay ON : 0V
Relay OFF: Battery voltage
High/low pressure abnormal: 0V
High/low pressure normal:
Battery voltage
Defrost sensor on the low temp. side: 0V
Defrost sensor on the high temp. side:
Battery voltage
Short circuit to GND: 0V
Normal, sensor line
breakage : 5V
Normal: 0V
Normal temperature (15
°
C):
Approx. 2V
Abnormal
Sensor short circuit : 5V
Sensor line breakage: 0V
Normal time (90
°
C): Approx. 4V
Abnormal
Sensor short circuit : 5V
Sensor line breakage: 0V
Harness line breakage
Not connected. 0V
Nomral: Battery voltage
}
Normal: 0V
Harness wire breakage
Abnormal SW
}
Battery
voltage
∗
1
∗
2
∗
3
8°C ± 3 (high pressure side)
0°C ± 3 (low pressure side)
Check terminal
1345OPQRWXYZ
267890FGHILN
TV
DMU
ABC
JKL
Inspection conditions
Unit operation
Car battery supply
Unit stop
AC power supply
Unit stop
Always
Car battery
AC power supply
}
Both are
not
provided.
AR
1
AR
2
AR
3
AR
4
AR
5
AR
7
Thermostat relay
Liquid injection electromagnetic relay
Evaporator fan motor relay
Condenser fan motor relay
Defrost electromagnetic valve relay
Drain hose heater relay
