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5
5
. Control
1
Dip Switch Functions and Factory Settings ................................ 56
[1] Outdoor Unit .......................................................................... 56
[2] Indoor Unit .............................................................................. 57
2
Controlling the Outdoor Unit ........................................................ 58
[1] Initial Control .......................................................................... 58
[2] Control at startup .................................................................... 58
[3] Bypass control ........................................................................ 58
[4] Frequency Control .................................................................. 59
[5] Oil-Return Control .................................................................. 60
[6] Outdoor Unit Fan .................................................................... 60
[7] Subcool Coil Control (Linear Expansion Valve (LEV1)).......... 60
[8] Circulating composition sensor (CS circuit)............................ 60
[9] Emergency Operation Mode .................................................. 61
[10] Capacity Control Between Outdoor Units (For P500 Type Only).. 61
[11] Control-Block Diagram.......................................................... 62
[12] Operation Modes .................................................................. 62
3
Controlling the Indoor Unit .......................................................... 63
[1] Thermostat Functions ............................................................ 63
[2] Actuator Control...................................................................... 64
[3] Temperature Setting Range .................................................... 64
[4] Emergency Operation Mode .................................................. 64
[5] Three-minute restart-suspension mode.................................. 65
[6] Anti-Freeze Control ................................................................ 65
[7] Operation during Electrical Power Failure .............................. 65
4
Operation Flow Chart .................................................................. 66
[1] Mode Selection Flow Chart .................................................... 66
[2] Operation in each Mode ........................................................ 68
6
6
. Refrigerant Amount Adjustment
1
Operating Characteristics and Refrigerant Amount .................... 69
[1] Operating Characteristics/Refrigerant Amount ...................... 69
2
Checking and Adjusting Refrigerant Amount .............................. 69
[1] Symptoms .............................................................................. 69
[2] Refrigerant Volume ................................................................ 69
[3] Amount of Refrigerant to Be Added ...................................... 70
3
Refrigerant-Adjustment Operation Mode .................................... 71
[1] Procedures (only for air-cooled outdoor units) ...................... 71
7
7
. Troubleshooting
1
List of Check Code ...................................................................... 73
2
Intermittent Fault Check Code (outdoor units only) .................... 74
3
Self-Diagnosis and Problem-Solving Using Check Codes .......... 75
[1] Mechanical.............................................................................. 75
[2] Communication / System........................................................ 86
[3] System error .......................................................................... 93
[4] Troubleshooting using information on problems
with Remote Control, Input from External Source ................ 95
4
Transmission Wave Pattern and Noise Check ............................ 99
[1] M-NET Transmission .............................................................. 99
[2] MA Remote Controller Transmission ...................................... 100
5
Troubleshooting ............................................................................ 102
[1] Principal Parts ........................................................................ 102
