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BUZZER
If a command is received by the air conditioner, 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, swing louver's position, and the fan speed. When power supply resumes or the system is
switched on again, the same operations as previously set will function.
OPERATION OF CONTROL PANEL ON HIGH WALL UNIT
ON/OFF SWITCH
i. This is a tact switch to select Cool→Heat→Off operation mode.
ii. In cool mode, the set temperature of the system is 24ºC with auto fan speed and swing. There are
no timer and sleep modes.
iii. In heat mode, the set temperature of the system is 24ºC with auto fan speed and swing. There are
no timer and sleep modes.
iv. Master unit that does not use LCD wall pad will globally broadcast.
v. Master unit that does not use LCD wall pad will globally broadcast.
Note: When button pressing is effective, master unit buzzer will beep twice and slave unit beeps once.
DRAIN PUMP
Drain pump turns on if thermostat cut in during cooling or dehumidification cooling cycle. It will remain on
for at least 5 minutes after thermostat cut out. During mode change from cooling to non cooling mode,
water pump will on for minimum 5 minutes.
Warning! If turn off the system by circuit breaker (or main power supply) the drain pump
does not work after turn off.
FLOAT SWITCH
Float-switch open before turning on.
If float switch (N/C) is opened before the unit is turned on. MTV1 is off. Drain pump and indoor fan will
operate. After float switch is closed, MTV1 is on.
Float switch is opened, when unit is on.
If float switch is opened continuously ≧5sec, drain pump will work and MTV1 cut off. When the float
switch is closed, the drain pump will run for additional 5 minutes. If the float switch is opened for 10
minutes continuously, MTV1 will remain off. Indoor fan runs at set speed and system report error.
Float switch is opened, when unit is off.
If the float switch is opened, the drain pump will work. When the float switch is closed, the drain pump will
run for additional 5 minutes. If the float switch is opened for 10 minutes continuously, system report error.
ELECTRIC HEATER SAFETY SWITCH
Before the electrical heater is turned on, the EH safety switch must be closed. If this contact is opened
continuously ≧1sec, heater must be cut off immediately and report error. Once the contact is returned to
close position ≧60sec, reset the error and heater is allowed to cut in again.
Should EH safety switch be opened ≧ 3 times within 60 minutes, heater is not allowed to cut in anymore.
Turn off the unit to reset the fault provided that the switch has returned to close position.
HYDRONIC CASSETTE
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