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Troubleshooting by Remote Controller Display / LED Display
SiBE28-804
234
Troubleshooting
Outdoor Unit: Fan Speed Pulse
For 1 Fan & 2 Fan models
(1) Disconnect the connector X2A with the power supply OFF and Operation OFF.
(2) Is the voltage between pins 4 and 3 of X2A about 15 VDC after turning the power supply on?
(3) Is the voltage between pins 4 and 1 of X2A about 5 VDC?
(4) Connect the connector A* with the power supply OFF and Operation OFF.
(5) When making one turn of the upper fan motor by hand after turning the power supply on, is
a pulse (0 and 5 V) generated 4 times between pins 4 and 1 of A*? (Measure at the contact
terminal on the harness side with the connector connected.)
For 2 Fan models
(6) Disconnect the connector X107A with the power supply OFF and Operation OFF.
(7) Is the voltage between pins 4 and 3 of X107A about 15 VDC after turning the power supply
on?
(8) Is the voltage between pins 4 and 1 of X107A about 5 VDC?
(9) Connect the connector X107A with the power supply OFF and Operation OFF.
(10)When making one turn of the lower fan motor by hand after turning the power supply on, is
a pulse (0 and 5 V) generated 4 times between pins 4 and 1 of X107A?
Check No.10
(2) (7): NO
→
Faulty PC board
→
Replace the PC board.
(3) (8): NO
→
Faulty PC board
→
Replace the PC board.
(5)(10): NO
→
Faulty hall IC
→
Replace the DC fan motor.
(2) (3) (5) (7) (8) (10): YES
→
Replace the PC board.
1
2
3
4
5
6
7
Fan speed pulse input (0V and 5V)
0V
15V
GND
NC
NC
250~350V(during operation)
(S2679)
Summary of Contents for FHQ100BUV1B x 2
Page 13: ...SiBE28 804 2 ...
Page 19: ...Model Name and Power Supply SiBE28 804 8 General Information ...
Page 29: ...Specifications SiBE28 804 18 Specifications ...
Page 33: ...Wired Remote Controller SiBE28 804 22 Remote Controller 1 2 Installation ...
Page 34: ...SiBE28 804 Wired Remote Controller Remote Controller 23 ...
Page 93: ...Outdoor Unit Fan Speed Control SiBE28 804 82 Functional Description ...
Page 131: ...Test Run and Operation Data SiBE28 804 120 Test Operation ...
Page 251: ...Troubleshooting by Remote Controller Display LED Display SiBE28 804 240 Troubleshooting ...
Page 277: ...PCB Layout SiBE28 804 266 Appendix ...
Page 297: ...RZQ100 140C7 RZQS125 140C7V1B SiBE28 804 286 Removal Procedure ...
Page 311: ...SiBE28 804 iv Index ...