TOSOT DC INVERTER U-MATCH AIR CONDITIONERS
90
No. SILK-SCREEN
INTERFACE
INTERFACE INSTRUCTION
6
CN3
Control power output[1-GND
、
2-18V
、
3-15V]
Power supply interface to the drive
1-pin: GND
2-pin: +18V
3-pin: +15V
7
COMM1
Communication line [1-3.3V
、
2-TX
、
3-RX
、
4-GND]
Communication needle stand of main control drive
1-pin: +3.3V
，
2-pin: TXD
3-pin: RXD
，
4-pin: GND
8
CN2
Communication line with1-pin
GND, 2-pin B and 3-pinA)
Communication needle stand with indoor unit
1-pin: GND, 2-pin: B
，
3-pin: A
9
CN1
Communication line with 1-pin plus
12V, 2-pin B, 3-pin A and 4-pin
GND
Communication interface (reserved):
1-pin: +12V, 2-pin: B,
3-pin: A, 4-pin: GND
10
H-PRESS
High pressure switch for fan speed
adjustment
Pressure protection switch for fan speed adjustment
11
HPP
High pressure switch for system
protection (obligate)
Interface of high pressure protection
12
LPP
Low pressure switch for system
protection (obligate)
Interface of low pressure protection
13
OVC-COMP
Compressor overload protection
Interface of compressor overload protection
14
T-SENSOR2
1&2 pin: Tube sensor
3&4 pin: Ambient temperature
5&6 pin: Air discharge
1&2 pin: Case temperature sensor
3&4 pin: Ambient temperature sensor
5&6 pin: Discharge temperature sensor
15
FA
Electronic expansion valve line
1 to 4-pin: Drive impulse
output;5-pin: +12V;
Interface of electronic expansion valve:
1 to 4-pin: Drive impulse output;
5-pin: +12V;
16 HEAT
Compressor electrical heater
Compressor electric heating belt
17 VA-1
Chassis electrical heater
Chassis electric heating belt
18 4V
4-way valve
4-way valve
