III - 1
Service Procedures
3
SM830063
3. Service Procedures
1. Troubleshooting............................................................................III - 2
1-1. Check before and after troubleshooting ....................................................................................................III - 3
1-2. General troubleshooting flow chart: diagnosis and remedy ......................................................................III - 6
1-3. Explanation of alarm messages ............................................................................................................III - 8
1-4. Alarm messages on the outdoor PCB...................................................................................................... III - 10
1-5. Symptoms and parts to inspect................................................................................................................ III - 11
1-6. Procedures when a specific component does not work at all .................................................................. III - 21
1-7. Service functions of remote controller...................................................................................................... III - 23
(A) Set service check switches .......................................................................................................... III - 23
(B) Use the test run procedure........................................................................................................... III - 24
(C) Check the sensor temperature readings ...................................................................................... III - 25
(D) Find out about past service problems .......................................................................................... III - 26
(E) Check the remote controller itself for correct operation ............................................................... III - 28
(F) Execute the auto. address operation ........................................................................................... III - 29
(G) Confirm and change the indoor unit address ............................................................................... III - 30
(H) Change the shift temperature in heating mode ............................................................................ III - 32
(I) Set the indoor unit address .......................................................................................................... III - 33
(J) Change the period of the filter timer ............................................................................................. III - 36
2. Sensor and Solenoid Layout Diagram ....................................... III - 37
2-1. Outdoor unit ............................................................................................................................................. III - 37
2-2. Indoor unit ................................................................................................................................................ III - 39
3. Thermistor Characteristic Curve.................................................III - 46
4. Test Run ........................................................................................III - 47
4-1. PCB setting & test run.............................................................................................................................. III - 47
4-2. Main Alarm Messages which Indicate Mis-Wiring & Mis-Setting ............................................................. III - 49
4-3. Main Alarm Messages Indicating Unit Malfunction .................................................................................. III - 49
5. PCBs illustrations.........................................................................III - 50
Note when replacing the indoor unit PCB ........................................................................................................ III - 56
6. Checking of Density Limit............................................................III - 53
7. Cautions for New Refrigerant R407C ......................................... III - 54
8. Compressor Failure......................................................................III - 56
8-1. Trouble shooting and method for checking the compressor .................................................................... III - 56
8-2. Judgment of 2 compressors replacement ................................................................................................ III - 56
9. Operation Procedure for Replacing the Compressor............... III - 57
10. Malfunction due to Noise .............................................................III - 59
11. Checking procedure for PCB (Printed Circuit Board) .............. III - 59
12. Check Pins ....................................................................................III - 60
12-1. Indoor PCB (Printed Circuit Board) .......................................................................................................... III - 60
12-2. Outdoor PCB (Printed Circuit Board) ....................................................................................................... III - 60
13. Double Speed of Time for the Timer........................................... III - 60
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