Figure 2-6 Control Box Section - Carrier Transicold 69NT40-541 Series Operation And Service

2.1.7 Control Box Section
The control box (Figure 2-6) includes the manual
operation switches, circuit breaker (CB-1), compressor,
fan and heater contactors, control power transformer,
fuses, keypad, display module, current sensor module,
controller module and the communications interface
module.
For units with three−phase evaporator fan motors, two
additional contactors, PA & PB, are installed, see 2 & 3
below.
1 2
CH
23
22
21
1. Compressor Contactor
2. Evap Fan Contactor PA (3−Phase only)
3. Evap Fan Contactor PB (3−Phase only)
4. Heater Contactor
5. Display Module
6. Communications Interface Module
7. Controller/DataCORDER Module (Controller)
8. Key Pad
9. Emergency Defrost Light
10. Start-Stop Switch
11. Remote Monitoring Receptacle
12. Manual Defrost Switch
T-318
3 4
PA PB
20 19 18 17

Figure 2-6 Control Box Section

2.1.8 Communications Interface Module
The communications interface module is a slave
module which allows communication between the
refrigeration unit and a ship system master central
monitoring station. The module will respond to
communication, and return information over the ships
main power line. Refer to the master system technical
manual for further information.
5
16 15 14
13. Condenser Fan Switch
14. Controller Battery Pack
15. Interrogator Connector (Box Location)
16. Control Transformer
17. Evaporator Fan Contactor - E1
18. Evaporator Fan Contactor - S1
19. Evaporator Fan Contactor - S2 or EF
20. Evaporator Fan Contactor - E2 or ES
21. Condenser Fan Contactor
22. Circuit Breaker − 460V
23. Current Sensor Module
2−6
6 7
13 12 11
8
10
9