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SK2019 FMCD-V-ECM-001
Auto Restart
The system uses non-volatile memory to save the present operation parameters when system is turned off or in case of
system failure or cessation of power supply. When power supply resumes or the system is switched on again, the same
operations as previously set will function.
Operation parameters
•
When using a handset, parameters are Mode, Set Temperature, Swing, and Fan Speed
•
When using a wall pad, parameters are Mode, Set Temperature, Swing, and Fan Speed, as well as the 7-day ON/OFF
Timer program.
On/Off Switch
•
This is a tact
switch to select COOL → HEAT → OFF operation mode.
•
In COOL mode, the set temperature of the system is 24ºC with auto fan speed. There are no timer and SLEEP modes.
•
In HEAT mode, the set temperature of the system is 24ºC with auto fan speed. There are no timer and SLEEP modes.
•
Master unit that does not use a LCD wall pad will globally broadcast.
Note: When button pressing is effective, the master unit buzzer will beep twice and the slave unit will beep once.
Electric Heater Safety Switch
Before the electrical heater is turned on, the EH safety switch must be closed and EC motor RPM must be more than
500RPM.
When electrical heater is ON, electrical heater safety switch is opened for ≥ 1 second or EC motor RPM is lower than
Modbus 310000 setting, EH will be turned off immediately and report an error and fan speed is changed to high speed.
Once the contact is returned to the closed ≥ 180 seconds, reset the error and the heater will start again.
When the EH safety switch is opened ≥ 3 times within 60 minutes the heater is not allowed to start anymore.
Turn off the unit to reset the fault, provided that the switch has returned to the closed position.
Low Temperature Protection of Indoor Coil in Winter
This is frost protection for when the unit is off to prevent water in the coil and room from freezing.
If Unit with SW2=0 (2-pipe system), is in Standby Mode
If Tr
≦
2 ºC for 2 minutes
1.
MTV1 is turned ON,
2.
AUX1 is closed,
3.
If Ti1 < 5ºC for 2 minutes EH (if present) is switched on
4.
Indoor fan is turned on at low speed.
If Tr
≧
5ºC for 2 minutes
1.
MTV1 is turned OFF,
2.
AUX1 is open,
3.
Electric Heater is turned Off
4.
Indoor fan Switched OFF.
If Unit with SW2=1(4-pipe system), is in Standby Mode
If Tr
≦
2 ºC for 2 minutes
1. MTV2 is turned ON,
2. AUX1 is closed,
3. If Ti2 < 5ºC for 2 minutes EH (if present) is switched on
4. Indoor fan is turned on at low speed.
If Tr
≧
5ºC for 2 minutes
1.
MTV2 is OFF,
2.
AUX1 is open,
3.
Electric Heater is turned Off
4.
Indoor fan Switched OFF.