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SK2018 CHV2-V/P-ECM-001
Buzzer
If a command is received by the fan coil unit, the master unit will respond with 2 beeps for each setting, and the slave unit
will respond with 1 beep.
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. Operation parameters are mode, set temperature and the fan speed. When
power supply resumes or the system is switched on again, the same operations as previously set will function.
On/Off Switch On LED Display
This is a tactics switch to select Cool→Heat→Off operation mode.
In COOL mode, the set temperature of the system is 24 ºC with auto fan speed. There are no timer and sleep modes.
In HEAT mode, the set temperature of the system is 24 ºC with auto fan speed. There are no timer and sleep modes.
Master unit that does not use wall pad will globally broadcast.
Drain Pump
Drain pump turns ON if the thermostat activates cooling or dehumidification. It remains on for at least 5 minutes after
the unit is turned OFF. During mode change from cooling or dehumidification to heating or fan mode, the water pump
will turn on for a minimum of 5 minutes.
Float Switch
Float-switch opens before unit is turned on
If the float switch (N/C) is opened before the unit is turned on, then MTV1 is off. The drain pump and indoor fan will
operate. After float switch is closed, MTV1 is on.
Float switch is opened, when unit is on
If the float switch is opened continuously ≥ 5 seconds, the drain pump will work and MTV1 will remain off. After the float
switch is closed, the drain pump will run for an additional 5 minutes.
If the float switch is opened for 10 minutes continuously, then MTV1 will remain off, the indoor fan will run at set speed
and the system reports an error.
Float switch is opened, when unit is off
If the float switch is opened, the drain pump will work. After the float switch is closed, the drain pump will run for an
additional 5 minutes. If the float switch is opened for 10 minutes continuously, the system reports an error.
Electric Heater Safety Switch
Before the electric heater is turned on, the EH safety switch must be closed and EC motor RPM must be more than
Modbus 310000 setting.
If electric heater is ON, electric 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 position ≥ 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.
NOTE
When button pressing is effective, the master unit buzzer will beep twice and the slave unit
will beep once.
CAUTION
If the system is turned off at the circuit breaker (or main power supply), the drain pump
will not work.
