Control Block Diagram - Carrier 42NQV025H Service Manual

8-1. Indoor Unit
42NQV035M
Heat Exchanger Sensor (Tc)
Room Temperature Sensor (Ta)
Infrared Rays Signal Receiver
and Indication
Initializing Circuit
Clock Frequency
Oscillator Circuit
Power Supply
Circuit
Converter
(D.C circuit)
Noise Filter
From Outdoor Unit
~
220-240V 50Hz
REMOTE CONTROLLER

8. CONTROL BLOCK DIAGRAM

M.C.U.
Functions
• Cold draft preventing Function
• 3-minute Delay at Restart for Compressor
• Fan Motor Starting Control
• Processing
(Temperature Processing)
• Timer
• Serial Signal Communication
• Clean Function
Serial Signal Transmitter/Receiver
Serial Signal Communication
(Operation Command and Information)
Remote Controller
Operation (START/STOP)
Operation Mode Selection
AUTO, COOL, DRY, HEAT,FAN ONLY
Fan Speed Selection
Louver AUTO Swing
Louver Direction Setting
– 25 –
Indoor Unit Control Unit
Motor Control
Thermo. Setting
ON TIMER Setting
OFF TIMER Setting
ECO
Hi-POWER
FILE NO. SVM-07013
Louver
Motor
Louver Motor
Drive Control
Indoor Fan
Indoor
Fan Motor
Infrared Rays, 36.7kHz