Pcb Function Manual And Operation Method; Temperature Parameters; Basic Function Of System - ComfortStar CARAT18-CD Service Manual

PCB function manual and operation method

6 6 6 6 6 PCB function manual and operation method
PCB function manual

Temperature parameters

Indoor Preset temp. (Tpreset)
Indoor ambient temp. (Tamb.) (15K sensor is adopted, the resistance is 15K)
Indoor heat exchanger copper tube surface temp. (Ttube) (20K sensor is adopted, the reistance is 20K)
Outdoor exhaust temp. (Texhaust)
Indoor heat exchanger copper tube surface temp.(Touter tube)

1.Basic function of system

1 Cooling mode
1.Under this mode, fan motor, swing will work under setting status, the temp. range is 16-30
scale)
2.Outdoor unit malfunction or unit stop running, indoor unit will keep original running status, malfunction displayed.
3.When 0 (Tset-Tamb.), if indoor fan motor is high speed, that the fan motorist running in middle speed, the
middle speed or low speed will be maintained;(this condition should be executed when compressor startup);the super high
speed will not rotate; When (Tamb-Tset)
(2)Dehumidifying mode
1.Under this mode, fan motor will run at low speed, swing will work at setting status, setting temp. range is 16-30
(61-86 Fahrenheit scale)
2.Outdoor unit malfunction or protection, unit will stop, indoor unit will keep original running status, malfunction
displayed.
(3)Fan mode
Under this mode, indoor fan motor could be setted at high speed, middle speed, low or auto speed, compressor, outdoor
unit and four-way valve will stop to run.
Under this mode, temp. range should be 16-30 (61-86 Fahrenheit scale)
(4)Heating mode
1.Under this mode, temp. range should be 16-30 (61-86 Fahrenheit scale)
2.Working condition and procedure of heating mode: When unit turn on and enter into Heating mode, indoor unit
enter into anti-cool wind mode, when unit is stop running, and indoor fan motor turns on, blowing heat will act.
3.Protection function, under heating mode, compressor will stop to run due to malfunction happened, indoor fan
motor will blow surplus heat.
4.Defrosting control: When receiving the defrosting signal from outdoor unit, displayer will display H1, 10s later, indoor
fan motor will stop to run.
5.Anti-coold wind function
6.Blow heat air function
a.If heating temp. meets the compressor stop running condition, compressors, outdoor fan motor will stop to run,
the upper and lower guide louver will rotate to horizontal position L, indoor fan motor run at setting fan speed
for 60s, then the indoor fan motor will stop to run.
b.Due to PG motor block running, the air guide board will keep the position when it stopping. (under each mode),
other malfunction unit will stop to run, the upper and lower air guide louver will rotate to horizontal position
L, indoor fan unit will run at setting fan speed and run for 60s, indoor fan unit will stop to run.
(5)Auto mode:
1.When Tam 26 , select the cooling mode, at this time, the setting temp. is 25 .(77 Fahrenheit scale)
2.Cooling and heating units: Tamb
3. Cooling only unit: When Tamb 22 , it will run at Fan mode, the setting temp. is 25 (77 Fahrenheit scale)
4.When 23 Tindoor amb.
run at auto mode, will keep the previous running mode. (When entering into Dehumidifying mode, it will run at
auto fan speed)
(6) Auto fan speed control mode
Indoor unit part
, the fan will return to the setting fan speed.
22 , will run at heating mode, at this time, the setting temp. is 20
25 ,firstly enter into auto mode and run at auto fan speed, other modes will
(61-86 Fahrenheit