Mitsubishi Heavy Industries SCM71ZM-S1 Technical Manual page 5

7.3.2 Outline of cooling operation ..............................................................194
(1) Summary ................................................................................................194
(2) Operation of major functional components in cooling mode ...................194
7.3.3 Protective control function
(1) Cooling overload protective control ........................................................195
(2) Cooling high pressure control
(3) Cooling low outdoor temperature protective control
(4) Heating high pressure control .................................................................196
(5) Heating overload protective control ........................................................197
(6) Heating low outdoor temperature protective control
(7) Refrigeration cycle system protective control
(8) Crankcase heater
(9) Inching prevention
(10) Compressor overheat protection ............................................................199
(11) Current safe ............................................................................................199
(12) Current cut
(13) Outdoor unit failure
(14) Discharge pipe sensor disconnection protection control ........................200
(15) Regulation of outdoor air flow .................................................................201
(16) Serial signal transmission error protection .............................................201
(17) Rotor lock ...............................................................................................201
(18) Outdoor fan motor protection ..................................................................201
(19) Outdoor fan control at low outdoor temperature
(20) Outdoor unit fan control at overload .......................................................202
8. MAINTENANCE DATA .................................................................................203
8.1 SRK, SRF and SRR series ......................................................................203
(1) Cautions .................................................................................................203
(2) Items to check before troubleshooting ....................................................203
(3) Troubleshooting procedure (If the air-conditioner does not run at all)
(4) Troubleshooting procedure (If the air-conditioner runs)
(5) Self-diagnosis table ................................................................................205
(6) Service mode (Trouble mode access function) ......................................206
(7) Inspection procedures corresponding to detail of trouble
(8) Phenomenon observed after shortcircuit, wire breakage on sensor ..............219
...................................................................................198
...................................................................................198
.............................................................................................200
................................................................................200
...............................................................195
.................................................................195
........................................198
.....................................201
4
- -
'17 • SCM-T-225
...............................196
...............................197
...........203
.........................204
.......................214