York CIDH018B21S, Service Manual

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SM-18001-rev.1
- Table of Contents -
3. Troubleshooting .....................................................................................................................3-1
3.1 Initial Troubleshooting .....................................................................................................................3-2
3.1.1 Checking Electrical Wiring and Power Supply .......................................................................3-2
3.1.2 Location of Printed Circuit Boards (PCBs) .............................................................................3-6
3.1.3 Checking Rotary Switch and DIP Switch Settings .................................................................3-7
3.1.4 Checking Wired Controller .....................................................................................................3-10
3.1.5 Checking Using 7-Segment Display.......................................................................................3-16
3.1.6 Checking Alarm Code History ................................................................................................3-16
3.1.7 Emergency Operation ............................................................................................................3-16
3.2 Troubleshooting Procedures ...........................................................................................................3-17
3.2.1 Alarm Code Table ...................................................................................................................3-18
3.2.2 Troubleshooting Using Alarm Codes ......................................................................................3-19
3.2.3 Abnormalities of Devices ........................................................................................................3-35
3.3 Procedures for Checking .................................................................................................................3-47
3.3.1 Self-Checking of PCBs using Wired Controller ......................................................................3-47
3.3.2 Self-Checking of Wired Controller ..........................................................................................3-47
3.4 Test Run ..........................................................................................................................................3-48
3.4.1 Test Run Using Wired Controller ............................................................................................3-49
3.4.2 Test Run from Outdoor Unit Side ...........................................................................................3-51
3.4.3 Checking the Test Run ...........................................................................................................3-51
3.4.4 Check List for Refrigerant System .........................................................................................3-52
3.4.5 Reset for Accumulated Operation Time of Compressor 1-2 (cUJ1- cUJ2).............................3-52