10
3-2-3 When the Outdoor Unit Does Not Operate. (Initial Diagnosis)
1) Checklist :
(1) Is input voltage normal?(rating voltage ±10% range)
(2) Is the set temperature of the remote control higher than room temperature in COOL mode?
(3) Is the POWER IN connector (CN78) linked correctly?
(4) Is the outdoor unit properly connected with the TERMINAL BLOCK connector(6P)?
2)
Troubleshooting procedure
After unplugging out the power cord should be recon-
nected within five seconds.
Does the operating lamp blink
YES
YES
NO
NO
NO
NO
NO
YES
NO
Outdoor unit is
out of order.
Power relay is
out of order
Power relay should be
replaced.
Refer to replace
PCB module
PCB is
out of order.
PCB and Room tempera-
ture sensor should be
checked.
Room temperature sensor is
out of order
Check as in the procedure "No Power parts"
Refer to page 8.
YES
②
②
①
①
①
③
③
Is the room sensor normal register?
(25¡C
→
10K½ )
10¡C
20¡C
30¡C
17.96k ½
12.09k ½
8.3k ½
Does the timer lamp blink during operation ?
Is the power relay RY71 operated by adjusting the room
temperature?
Is the rating voltage ±10% range applied relay between
CN78
①
and
③
.
Test rod location
Normal
+ - Condition
Voltage
IC06 Pin #6 GND RY71 ON DC 4.8V
9-00188A(3)-TS 4/17/01 5:16 PM Page 10
Summary of Contents for UQ18A6RC
Page 23: ...22 6 PCB Diagrams 6 1 Main PCB PD TQ24A1R 00 ...
Page 25: ...24 7 Wiring Diagrams 7 1 Indoor Unit AQ24A2RC AQ18A6RC ...
Page 27: ...26 ...
Page 28: ...ELECTRONICS ...
