Wiring Diagram; Remote Control & Unit Functions - YMGI WMMS-09EW-V2B Technician Service Manual

WIRING DIAGRAM

WMMS-09EW-V2B(59) (2) / WMMS-12EW-V2B(59) (2)
WMMS-18EW-V2B(59) (2)
These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit.
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
CONTROLLER FUNCTION
Temperature Parameter
* Indoor ambient temperature (Tamb.)
* Indoor copper tube temperature (Ttube)
Basic Functions
Cooling Mode
1) Fan motor and swing works under setting status
2) Indoor unit will run under the original status when outdoor unit malfunction or stop to run protection,
malfunction displays.
3) The fan motor stops when the modes conflicts.
The temperature setting range is 61-86 F under the mode.
Dry Mode
1) Fan motor runs under low speed, swing runs by setting status.
2) Indoor unit will run under the original status when outdoor unit malfunction or stop to run protection,
malfunction displays.
The temperature setting range is 61-86 F under the mode.
Fan Mode
In this mode, only indoor fan is running at setting status. Under auto fan speed, it will run by cooling auto fan.
Heating Mode
1) The indoor unit goes to anti-cool wind when the unit is ON; it goes to blow residual heat when the unit is OFF
and indoor fan motor was ON before.
2) Protection function, compressor is OFF as malfunction (including any temperature sensor malfunction), indoor
fan motor runs with blowing residual heat.
3) Anti-cool wind: indoor fan motor runs after 2 minutes delayed.
Blow residual heat: the indoor unit runs 60S with the original fan speed then stop; the fan speed cannot shift
and the guide board changes to the heating minimum angle when blowing residual heat.
4) Indoor fan motor stops and does not blow residual under defrost and oil return; the temperature sensor of
indoor unit cannot be inspected during defrost, oil return and exit in 3min process.
The temperature setting range is 61-86 F under the mode.
Auto Mode
In this mode, the unit will select the cooling, heating running mode or fan mode automatically according to the
change of ambient temperature. Protection function is the same as that in heating, cooling mode.
Mode Clash
When the indoor receiving the information mode clash from outdoor unit and the digit is 1, the indoor load (indoor
fan motor, swing) stops, the malfunction indicator displays, the mode send to outdoor unit is the mode received
by remote control.
When the time of TIMER ON reach, if the indoor receiving the information mode clash from outdoor unit and the
digit is 1, the indoor load (indoor fan motor, swing) stops, the malfunction indicator displays, the mode send to
outdoor unit is the mode received by remote control.
Other Functions
Buzzer
When the controller energized, receiving signal from remote control and auto button, the buzzer will beep.
Auto Button
Press the button when turn off the unit, the unit runs by auto mode, indoor fan motor runs under auto fan speed,
turn on swing. Press auto button under the unit is ON, it will OFF.
Auto Fan Speed Control
Under cooling, heating, fan mode, the indoor fan motor will select the high, med, low fan speed automatically
according to the change of ambient temperature, the auto fan speed is low speed under FAN mode. The spacing
of shift each fan speed is 3.5 min.
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
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REMOTE CONTROL & UNIT FUNCTIONS
* Evaporator inlet pipe temperature (Tinlet pipe)
* Evaporator outlet pipe temperature (Toutlet pipe)
O
O
O
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