![background image](http://html1.mh-extra.com/html/daikin/ftxd60jv1b/ftxd60jv1b_user-manual_4699899134.webp)
Checks
SiBE04-101
126
Service Diagnosis
5.1.12 Outdoor Unit PCB Rotation Pulse Input Check
Check No.27
1. Turn OFF the power switch and disconnect the connector S70.
2. Turn ON the power switch and check the voltage at the following positions:
•
Approx. DC15V between the pins No.3 to No.4
•
Approx. DC0V between the pins No.2 to No.4
•
Approx. DC15V between the pins No.1 to No.4
3. Turn OFF the power switch and connect the connector S70.
4. Are the pulses (0V and 15V) outputted between the pin No.2 of 01S108 and the pin No.3 of 01S107
when the power is turned ON and the fan motor is rotated one turn by hand?
1. No voltage at the positions in (2)
→
PCB defective
→
Replace PCB.
2. No pulse at the pins in (4)
→
Hall IC defective
→
Replace DC fan motor.
3. Voltage of (2) and pulse of (4) are both outputted.
→
Replace PCB.
5.1.13 Fan Motor Position Signal Check
Check No.28
Measurement method
1. Turn the power supply on.
2. Check the voltage of U-,V-,W-Phase of the above upper and lower fans with fan rotating.
3. The waveform measured will be as shown below.
4. It is OK if , as shown above 3, approximately 5V voltage is turned on and off.
1
2
3
4
5
6
7
Pulse output from fan (0 and 15V)
0 ~ 12V
15V
GND
NC
NC
DC380V
S70
(R1083)
Locations for measurement
(Upper/Lower fans + U-,V-,W-Phase)
Multiple-meter, + side (A)
- side (B)
S514
S504
S501
S506
Q504
U
Q503
V
Q502
W
Q507
U
Q506
V
Q505
W
PCB2
GND
(Q0003)
(B)
(A)
(A)
(A)
(A)
(A)
(A)
+5V
(R1230)
SiBE04-101.book Page 126 Monday, October 15, 2001 3:08 PM