Check; Fan Motor Connector Output Check; Four Way Valve Performance Check - Daikin FT25CV1A Service Manual

Si01-406

5. Check

5.1

Fan Motor Connector Output Check

Check No.01 1. Check connector connection.
2. Check motor power supply voltage output (pins 4-7).
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).
5.2

Four Way Valve Performance Check

Check No.5
Service Diagnosis
S1
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~ 6 VDC)
1
Rotation pulse input
Turn off the power and turn it on
again.
Start the heating-mode run.
S80 voltage
at DC 180-220 V with
compressor on?
(Fig. 1)
YES
Disconnect the four way valve coil
from the connector and check the
continuity.
Four way valve
coil resistance at
3kΩ±0.5kΩ?
YES
(Fig. 1)
Voltage at S80
DC180-220V
Compressor
ON
(R3199)
∗ Four way valve coil
Cooling / dry : Continuity
Heating : No continuity
NO
NO
Time

Check

Replace the outdoor unit
PCB.
Replace the four way valve
coil.
Replace the four way valve.
(R3047)
115