SERVICE MANUAL - Toshiba

7-5. Troubleshooting in Test Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1397-5-1. A Check Code Is Displayed on the Remote Controller . . . . . . . . . . . . . . . . . . . . . . . . 1397-5-2. Operation from the indoor remote controller is not accepted, and a check code is displayedon the 7-segment display of the interface PC board of the header unit. . . . . . . . . . . . 1407-5-3. There is no display of a check code on the 7-segment display on the interface PC board ofthe header unit, although there is indoor unit that is not accepting operation from the indoorremote controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1407-5-4. In checking the number of connected outdoor units and connected indoor units after addresssetup, a lower number of connected units is displayed. (There are outdoor/indoorunits that do not operate in a test operation.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1417-6. Test Operation Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1437-6-1. Fan Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1437-6-2. Cooling/Heating Test Operation Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1447-7. Service Support Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1487-7-1. Check Function for Connecting of Refrigerant and Control Lines . . . . . . . . . . . . . . . . 1487-7-2. Function to Start/Stop (ON/OFF) Indoor Unit from Outdoor Unit . . . . . . . . . . . . . . . . . 1507-7-3. Error Clearing Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1557-7-4. Remote Controller Distinction Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1577-7-5. Pulse Motor Valve (PMV) Forced Open/Close Function in Indoor Unit . . . . . . . . . . . . 1587-7-6. Pulse Motor Valve (PMV) Forced Open Fully/Close fully Function in Outdoor Unit. . . 1587-7-7. Solenoid Valve Forced Open/Close Function in Outdoor Unit . . . . . . . . . . . . . . . . . . . 1597-7-8. Fan Operation Check in Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1607-7-9. Abnormal Outdoor Unit Discrimination Method By Fan Operating Function . . . . . . . . 1617-7-10. Manual Adjustment Function of Outside Temperature (TO) Sensor . . . . . . . . . . . . . . 1627-7-11. Monitor Function of Remote Controller Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1648 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1668-1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1668-2. Troubleshooting Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1678-3. Troubleshooting Based on Information Displayed on Remote Controller . . . . . . . . . . . . . . . . . 1738-4. Check Codes Displayed on Remote Controller and SMMS-i Outdoor Unit (7-Segment Display on I/F Board) and Locations to Be Checked. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1788-5. Diagnosis procedure for each check code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1948-6. 7-Segment Display Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2258-7. Oil Level Judgment Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2318-8. Leakage/Clogging of Refrigerating Cycle Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2328-9. Sensor Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2368-10. Pressure Sensor Output Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2399 BACKUP OPERATION (EMERGENCY OPERATION) . . . . . . . . . . . . . . . . . . . . . . . 2419-1. Note for Backup Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2419-2. Compressor Backup Operation Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2429-3. Outdoor Unit Backup Operation Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2439-3-1. Follower outdoor unit backup operation setting (failure of follower outdoor unit) . . . . . 2439-3-2. Header outdoor unit backup operation setting (failure of header outdoor unit) . . . . . . 2453