Toshiba MMY-MAP0804HT8-E Service Manual page 4

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