31 SERVICE MANUAL FOR AMERICA
Function of Inverter indoor unit
一、summary
1.
This control is use for DC Multi-Spilt air conditioners.
2.
Power of indoor unit supply is 220-240V/50Hz, voltage range is 170V～270V.
3.
Control precision of indoor temperature is ±1.8
O
F.
4.
Indoor fan motor is PG motor.
5.
Control accord with :
GB5956－91《safe requirement of air conditioner》
GB7725－2004《air conditioner》；GB3797－87《control equipment of electrical equipment》
Vibrancy test：frequency 50Hz，acceleration 2.5g
PCB ought to accord with GB4588.1 and GB4588.2
Electromagnetism compatibility ought to accord with relate standard of nation.
二．Base parameter
１．
Use condition：ambient temperature 5
O
F～185
O
F, relative humidity =30-95%.
２．
Receive distance of remote:<10m
３．
Angle of remote:<120 degree
４．
Control precision of temperature: ±1.8
O
F
５．
Speed precision of indoor fan motor: ±10RPM
６．
Time precision: <0.1%
三．Major function of control
1.
Remote
Turn on/off
Mode select
auto
cooling
dehumidify
heating
ventilation
Indoor fan speed select
manual mode: high, middle, low speed
auto mode: accord difference of indoor room temp. and set temp. automatic select.
Temperature setting
Cooling: 60
O
F――90
O
F, default is 77
O
F
Heating : 60
O
F――90
O
F, default is 77
O
F
Dehumidify: default is 77
O
F and it can’t adjust.
Auto: default is 77
O
F and it can’t adjust.
Ventilation: 60
O
F――90
O
F, default is 77
O
F
Sleeping
It can set or cancel 24HR sleep .
Timer on or timer off
Timer can set 24HR on or off.
Air flower control.
Turbo running
Hold key
2.
Main PCB board
