Panasonic OCU-CR400VF8 Operating Instructions And Installation Instructions page 27

Electrical box internal layout
Left side of refrigeration unit
CR2-EN PCB
CRD2-EN PCB
Power source
terminal base
Showcase operation
terminal base
(Cautions)
1. Connect the grounding wire at the indication label without fail.
2. The components marked * need to be acquired locally. However, *2 is included in the showcase.
3. Connect external alarm (no-voltage contact) at the terminal 9-10.
4. Stopping the refrigerating equipment: Turn S1 to stop. To stop for a long time, turn OFF also EB1.
5. When alarm is generated, check the abnormality content, eliminate the cause of the problem, and then turn ON the
power.
6. Local wiring should be shielded cable.
Left side of refrigeration unit
without MTG for CRD2-EN PCB
Reactor
INV4-H-EN PCB
INV4-MF-EN PCB
External alarm terminal base
Liquid tube electromagnetic valve terminal base
Communication terminal base
CR2-EN PCB
Control terminal base
EN - 27
Symbol
S1 Operation switch
1X1,1X2,1X3 Auxiliary relay
CM Compressor motor
CH Crankcase heater
CF Gas cooler fan motor
MOV5 Pressure reduction electric expansion valve
MOV6 Gas return electronic expansion valve
MOV7 Liquid injection control electronic expansion valve
Compressor capacity control, oil level and other
protection control
CR2-EN PCB
X23: Operation/protection, X24: External alarm
X25: Back-up solenoid valve
EV1 Oil control solenoid valve
EV2 Balance pressure solenoid valve
EB1 Earth leakage circuit breaker
21C Liquid tube electromagnetic valve
23C Compartment temperature adjustment thermostat *2
63H High pressure switch
BZ External abnormally alarm buzzer
Control terminal base
Factory wiring
Local wiring
Name
*
*