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7-5. Troubleshooting in Test Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139<br />
7-5-1. A Check Code Is Displayed on the Remote Controller . . . . . . . . . . . . . . . . . . . . . . . . 139<br />
7-5-2. Operation from the indoor remote controller is not accepted, and a check code is displayed<br />
on the 7-segment display of the interface PC board of the header unit. . . . . . . . . . . . 140<br />
7-5-3. There is no display of a check code on the 7-segment display on the interface PC board of<br />
the header unit, although there is indoor unit that is not accepting operation from the indoor<br />
remote controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140<br />
7-5-4. In checking the number of connected outdoor units and connected indoor units after address<br />
setup, a lower number of connected units is displayed. (There are outdoor/indoor<br />
units that do not operate in a test operation.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141<br />
7-6. Test Operation Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143<br />
7-6-1. Fan Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143<br />
7-6-2. Cooling/Heating Test Operation Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144<br />
7-7. Service Support Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148<br />
7-7-1. Check Function for Connecting of Refrigerant and Control Lines . . . . . . . . . . . . . . . . 148<br />
7-7-2. Function to Start/Stop (ON/OFF) Indoor Unit from Outdoor Unit . . . . . . . . . . . . . . . . . 150<br />
7-7-3. Error Clearing Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155<br />
7-7-4. Remote Controller Distinction Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157<br />
7-7-5. Pulse Motor Valve (PMV) Forced Open/Close Function in Indoor Unit . . . . . . . . . . . . 158<br />
7-7-6. Pulse Motor Valve (PMV) Forced Open Fully/Close fully Function in Outdoor Unit. . . 158<br />
7-7-7. Solenoid Valve Forced Open/Close Function in Outdoor Unit . . . . . . . . . . . . . . . . . . . 159<br />
7-7-8. Fan Operation Check in Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160<br />
7-7-9. Abnormal Outdoor Unit Discrimination Method By Fan Operating Function . . . . . . . . 161<br />
7-7-10. Manual Adjustment Function of Outside Temperature (TO) Sensor . . . . . . . . . . . . . . 162<br />
7-7-11. Monitor Function of Remote Controller Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164<br />
8 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166<br />
8-1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166<br />
8-2. Troubleshooting Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167<br />
8-3. Troubleshooting Based on Information Displayed on Remote Controller . . . . . . . . . . . . . . . . . 173<br />
8-4. Check Codes Displayed on Remote Controller and SMMS-i Outdoor Unit (7-Segment Display on I/<br />
F Board) and Locations to Be Checked. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178<br />
8-5. Diagnosis procedure for each check code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194<br />
8-6. 7-Segment Display Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225<br />
8-7. Oil Level Judgment Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231<br />
8-8. Leakage/Clogging of Refrigerating Cycle Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232<br />
8-9. Sensor Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236<br />
8-10. Pressure Sensor Output Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239<br />
9 BACKUP OPERATION (EMERGENCY OPERATION) . . . . . . . . . . . . . . . . . . . . . . . 241<br />
9-1. Note for Backup Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241<br />
9-2. Compressor Backup Operation Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242<br />
9-3. Outdoor Unit Backup Operation Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243<br />
9-3-1. Follower outdoor unit backup operation setting (failure of follower outdoor unit) . . . . . 243<br />
9-3-2. Header outdoor unit backup operation setting (failure of header outdoor unit) . . . . . . 245<br />
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