CONTENTS
3.10 Chartless function .....................................3-62
3.10.1 Chart indication mode ........................3-62
3.10.2 Chartless code display function..........3-64
3.10.2.1 List of chartless codes.................3-64
3.10.2.2 P code .........................................3-65
3.10.2.3 H code .........................................3-66
3.10.2.4 D code.........................................3-68
3.11 Communication modem (optional) ............3-69
4. Service and Maintenance .................................4-1
4.1 Main components and maintenance .............4-1
4.1.1 Scroll compressor...................................4-1
4.1.2 Air-cooled condenser .............................4-3
4.1.3 Fusible plug............................................4-3
4.1.4 Drier........................................................4-4
4.1.5 Liquid/moisture indicator ........................4-4
4.1.6 Electronic expansion valve.....................4-5
4.1.7 Suction modulating valve .......................4-6
4.1.8 Solenoid valve........................................4-7
4.1.9 Discharge pressure regulating valve......4-8
4.1.10 Check valve..........................................4-9
4.1.11 High pressure switch (HPS) .................4-9
4.1.12 Low pressure switch (LPS).................4-10
4.1.13 High pressure transducer (HPT) ........4-10
4.1.14 Temperature sensors .........................4-11
4.1.15 Humidity sensor..................................4-12
4.2 Fan and fan motor.......................................4-13
4.3 PT and CT board.........................................4-14
4.4 Maintenance service ...................................4-16
4.4.1 Collection of refrigerant ........................4-16
4.4.2 Gauge manifold....................................4-16
4.4.3 Automatic pump down..........................4-18
4.4.4 Refrigerant recovery and charge..........4-20
4.4.5 Evacuation and dehydrating.................4-24
5. Optional Devices ...............................................5-1
5.1 USDA transportation .....................................5-1
5.1.1 Type of USDA sensor/receptacle...........5-1
5.1.2 Initial setting ...........................................5-1
5.1.3 USDA sensor calibration ........................5-1
5.1.4 USDA transportation requirement ..........5-1
5.1.5 USDA report...........................................5-1
6. Troubleshooting................................................6-1
6.1
Refrigeration and electrical system
..................6-1
6.2 Alarm codes on electronic controller
(F-code/E-code) ............................................6-4
6.3
Troubleshooting for automatic PTI (J-code)
.....6-8
6.4 Diagnosis based on recording chart............6-10
6.5 Emergency operation..................................6-13
6.5.1 Emergency operation of controller .......6-13
6.5.2 Short circuit operation of controller.......6-14
6.5.3 Emergency operation of electronic
expansion valve....................................6-16
6.5.4 Emergency operation of suction modulating
valve .....................................................6-17
6.5.5 Automatic Back up for supply- and return
air temperature sensors (optional) .......6-18
7. Appendix............................................................7-1
7.1 Standard tightening torques for bolts ............7-1
7.2
Standard tightening torques for flare nuts
........7-1
7.3
Resistance of motor coil and solenoid valve coil
...7-1
7.4 HFC 134a temperature-vapor pressure
characteristics table ......................................7-2
7.5 Temperature sensor characteristics table.....7-3
7.6
Temperature sensor characteristics table DCHS
...7-4
7.7
High pressure transducer characteristics table
...7-4
7.8
Low pressure transducer characteristics table
...7-4
7.9 Piping diagram ..............................................7-5
7.10 Pilot lamps and monitoring circuit ...............7-6
7.11 Fuse protection table...................................7-7
7.12 Schematic wiring diagram...........................7-8
7.13 Stereoscopic wiring diagram.......................7-9
INDEX
Safety Precautions
• Danger .................................................................3
• Warning................................................................4
• Caution.................................................................5
1. Introduction .......................................................1-1
1.1 Operation range ............................................1-1
1.2 Basic Names of components ........................1-1
1.3 Basic operation of refrigeration unit ..............1-2
1.3.1 Starting operation...................................1-2
1.3.2 Checking during operation .....................1-5
1.3.3 Procedure after operation.......................1-5
2. General description ..........................................2-1
2.1 Main specifications........................................2-1
2.2 Names of components ..................................2-2
2.2.1 Outside...................................................2-2
2.2.2 Inside......................................................2-3
2.2.3 Control box.............................................2-4
2.3
Set point list of functional parts and protection devices
...2-5
2.4 Operating pressure and running current .......2-6
2.5 Operation modes and control........................2-8
2.5.1 Frozen mode ..........................................2-9
2.5.2 Chilled and partial frozen mode............2-11
2.5.3 Defrosting mode...................................2-13
2.5.4 Common control...................................2-16
3. Electronic Controller.........................................3-1
3.1 Function table................................................3-1
3.2 Basic operations of electronic controller .......3-3
3.2.1 Control panel..........................................3-3
3.2.2 Operation mode and control...................3-5
3.3 Operation procedure .....................................3-6
3.3.1 Operation procedure flow chart..............3-6
3.3.2 Mode operation procedure .....................3-9
1. Current indication mode .........................3-9
2. Operation setting mode........................3-10
3. Battery mode........................................3-11
4. Mode operation ....................................3-12
5. LED display light OFF mode ................3-17
6. Sensor indication mode........................3-18
7. Temperature record scroll mode ..........3-21
8. Alarm record scroll mode .....................3-24
9. PTI record scroll mode .........................3-26
3.3.3 Setting flow chart..................................3-27
10. Optional function mode ......................3-29
11. Basic setting mode.............................3-30
12. Optional condition setting mode.........3-32
13. Input data mode .................................3-34
14. Controller software download mode...3-35
3.4 Alarm display and back-up function ............3-36
3.4.1 Alarm list...............................................3-36
3.4.2 Back-up operation at sensor
malfunction...........................................3-37
3.5 Battery.........................................................3-39
3.5.1 Specifications .......................................3-39
3.5.2 Function................................................3-39
3.5.3 Battery check........................................3-39
3.5.4 Battery replacement .............................3-40
3.6
Information interchange with personal computer
....3-41
3.6.1 Data logging .........................................3-42
3.6.2 Software configuration..........................3-43
3.7
Inspection procedure for electronic controller
........3-45
3.8 Controller replacement and initial setting....3-46
3.8.1 Controller replacement.........................3-46
3.8.2 Initial setting & operation procedure.....3-48
3.9
PTI (Pre Trip Inspection) and periodic inspection
...3-49
3.9.1 Inspection item .....................................3-50
3.9.2 Automatic PTI.......................................3-53
3.9.2.1 PTI selection mode........................3-54
3.9.2.2 Short PTI (S.PTI)...........................3-55
3.9.2.3 Full PTI (F.PTI)..............................3-56
3.9.2.4
Alarm list during PTI
........................3-58
3.9.2.5 Manual check (M.CHECK) ............3-59
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