31
Circuit Descriptions
1) Most of relays can control the compressor, heaters and several option functions.
2) For the compressor, #12 pin of MICOM signals HIGH(5V). This signal enters to #2 of IC03 and #15
of output terminal will be on and grounded. When the rely RY71 is switched to NO terminal a 115V
power is supplied to the compressor. If MICOM outputs LOW(0V), the compressor will stop.
3) If the RY71 is connected to NC, RY72 and 73 for defrost heaters will be on and corresponding heater.
Will be activated according to the signal from MICOM. Like the above block diagram, operation of F,
R defrost heater is determined by the operation of the relay for COMP.
RELAY
Load
Comp Operation
Comp off, Defrost-Heater Off
Defrost-Heater On
Comp Off, Defrost-Heater Off
Remark
Defrost-Heater Power Off
Comp Power Off
COMP
on
on
off
off
Defrost Heater
off
on
on
off
10-7) Load Drive Circuit
Summary of Contents for RB1955SWRB1955SH
Page 7: ...5 WARRANTY INFORMATION 7 ...
Page 11: ...11 Refrigeration Cycle and Cool Air Circulation Route 7 2 Cool Air Circulation ...
Page 33: ...33 Circuit Descriptions ...
Page 37: ...37 Diagnostics 5 If the defrost sensor of the freezer has trouble ...
Page 40: ...40 Diagnostics 11 5 If the refrigerator fan doesn t work ...
Page 41: ...41 Diagnostics 11 6 If the compressor cooling fan motor doesn t work ...
Page 43: ...43 Diagnostics ...
Page 45: ...45 Diagnostics 2 If beep sounds continuously 3 When the digital panel PCB does not light ...
Page 46: ...46 Diagnostics 4 When a button of the digital panel is not selected ...
Page 48: ...48 12 Illustrated Parts Catalog 12 1 Freezer ...
Page 50: ...50 Illustrated Parts Catalog 12 2 Refrigerator ...
Page 52: ...52 Illustrated Parts Catalog 12 3 Disassemblyof Door ...
Page 54: ...54 Illustrated Parts Catalog 12 4 Cabinet ...
Page 61: ...61 11 PCB Circuit Diagram ...
