Service manual
Table Of Contents
- TopPage
- SPECIFICATIONS
- EXPLANATION OF CIRCUIT AND OPERATION
- [1] BLOCK DIAGARM
- [2] FUNCTIONS
- 1. FREQUENCY CONTROL
- 2. OVER CURRENT PROTECTION
- 3. COMPRESSOR PROTECTION CONTROL
- 4. POWER TRANSISTOR MODULE PROTECTION
- 5. SERIAL SIGNALS
- 6. THERMISTOR OPEN OR SHORT
- 7. MISWIRING CHECK
- 8. SAFETY TIME
- 9. PUMP DOWN SWITCH
- 10. CONTROL OF COMPRESSOR OR AND EXPANSION VALVE
- 11. DEFROST OPERATION
- 12. Power factor module Output voltage
- [3] ACTIVE FILTER CIRCUIT
- [4] EXPLANATION OF IPM DRIVE CIRCUIT
- FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES
- REFRIGERATION CYCLE
- DISASSEMBLING PROCEDURE
- PartsGuide
- EndPage
AEX3M18JR
1 – 6
CONTROL P.W.B and DISPLAY P.W.B
from THERMISTOR
from HEAT SINK THERMISTOR
from SUCTION THERMISTOR
from IPM PWB "CN101"
from RELAY
P.W.B. "CN9"
from POWER SUPPLY P.W.B. "CN16"
from POWER SUPPLY P.W.B. "CN15"
from POWER SUPPLY
P.W.B. "CN17"
from EXPANSION VALVE C
from EXPANSION VALVE B
from EXPANSION VALVE A
from TERMINAL BOARD
POWER SUPPLY
from TERMINAL BOARD
UNIT A - "N"
UNITA~C-"2"
COMP. TENP.
HEAT EXCHANGER TEMP.
OUT DOOR TEMP.
SUCTION TEMP.
DISPLAY P.W.B
CONTROL P.W.B