English
13
Wiring
1.
Safe handling of high voltage part
• Turn the circuit breaker off and wait for 10 minutes before servicing.
1-1. To prevent electrical shock
• Use tester to check that the voltage between ‘+’ and ‘-’ is 50V or less. (Refer to figure below for the locations to check.)
• The surface of the test points (+, -) may be covered with coating.
• Be sure to make firm contact between tester probes and test points.
WARNING
All circuitry including thermistor is subject to power supply voltage.
2.
Reconnecting after check
• When reconnecting, be sure to reconnect everything the same way as it was before.
LED A
MULTIMETER
(DC, VOLTAGE
RANGE)
DB1
AC
DC
DC
COMPRESSOR LEAD WIRE
REACTOR LEAD WIRE
-
+
S21 (RED) (ROOM B)
ELECTRONIC EXPANSION VALVE COIL
S20 (WHITE) (ROOM A)
ELECTRONIC EXPANSION VALVE COIL
S91 (WHITE)(GAS)
THERMISTOR
LEAD WIRE
S92 (RED) (LIQUID)
THERMISTOR LEAD WIRE
S40 OL LEAD WIRE HIGH PRESSURE SWITCH
S70 FAN MOTOR LEAD WIRE
S80 (WHITE)
FOUR WAY VALVE LEAD WIRE
S90 THERMISTOR LEAD WIRE
S99 HEATING LOCK
(-) (+)
TESTER PROBE
COATING
PCB
3PEN423316-2K.book Page 13 Monday, May 15, 2017 1:15 PM