Check - Daikin E-Series Service Manual

Troubleshooting for RA Indoor Unit
4.6

Check

4.6.1 Fan Motor Connector Output Check
Check No.01 1. Check connector connection.
2. Check motor power supply voltage output (pins 4-7 and 4-8).
3. Check motor control voltage (pins 4-3).
4. Check rotation command voltage output (pins 4-2).
5. Check rotation pulse input (pins 4-1).
Check No.02
1. Check connector connection.
2. Check motor control voltage output (pins 2-1).
5
4
3
2
1
4.6.2 Limit Switch Continuity Check
Check No.03 Remove the front grille. The limit switch is located at the left side of the drain pan assembly.
Check the continuity of the switch connection.
∗ The shutter can be opened and closed with hand. Keep the shutter open and closed all the
278
S1 or S301
7 Motor power supply voltage
6 Unused
5 Unused
4
P.0V (reference potential)
3 Motor control voltage (15 VDC)
2 Rotation command voltage (1~ 5 VDC)
1 Rotation pulse input
S202
Motor power supply voltage
Unused
Unused
P.0V (reference potential)
Motor control power supply
(R1073)
Upward
Limit switch
way for each continuity check steps.
8
7
6
5
4
3
2
1
Tester
Forward
S302
Motor power supply voltage
Unused
Unused
Unused
P.0V (reference potential)
Motor control voltage (15 VDC)
Rotation command voltage (1 to 5 VDC)
Rotation pulse input
Shutter status Open
Continuity Continuity
SiENBE18-621
(R4684)
Closed
No continuity
(Q0363)
Troubleshooting