Daikin R410A Split Series Installation Manual page 15

Service
1.
Concerning Handling of High Voltage Parts
Do not touch the charged parts for 10 minutes after the safety breaker is turned off, because of the danger of high voltage.
2.
To Prevent Electrical Shock
Use a tester to check that the voltage between DB1 " + " and " – " is 50V or less.
(Refer to the Figure at below for the locations to check.)
3.
Reconnecting After Check
When reconnecting, be sure to reconnect everything the same way it was before.
4.
Layout Diagram of Electrical Components
MULTIMETER
(DC. VOLTAGE RANGE)
S70
FAN MOTER LEAD WIRE
Fault Diagnosis by LED on Outdoor Unit PCB.
LED FLASHING
LED ON
LED OFF
Notes:
1) Switch the power off and back on again if the LED display recurs, the outdoor unit PCB is fault.
2) Switch the power off and back on again if the LED display recurs, either the outdoor unit PCB is at fault or the thermal fuse in
the terminal strip (X2M) is severed.
Error detection should be performed using the malfunction diagnosis function on the remote controller.
13
DB1
S21
ELECTRONIC EXPANSION VALVE COIL
LEAD WIRE (ROOM B)
REACTOR LEAD WIRE
DIAGNOSIS
NORMAL CHECK THE INDOOR UNIT
SUPPLY VOLTAGE OR RELATED ABNORMALITY OR NOTE ) 2.
LED A
(SLIT INSIDE)
S91
THERMISTOR LEAD WIRE
(LIQUID & GAS PIPE)
S90
THERMISTOR LEAD WIRE
S80 (2AMXS, 2MXS only)
REVERSING SOLENOID
VALVE COIL LEAD WIRE
S20
ELECTRONIC EXPANSION VALVE COIL
LEAD WIRE (ROOM A)
THERMISTOR LEAD WIRE
COMPRESSOR & OL LEAD WIRE
NOTE ) 1.
LED A
(SLIT INSIDE)
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