Page 31 of 53
SK2017 AHRI PFWSL-V/P-AECM-001
D.8.
Modulating Valve Control Under Energy Saving Mode
If the modulating valve is used, the water flow is adjusted from 0 to 100% according to the room temperature and set
temperature. The controller adjusts the modulating valve signal input from 0 to 10VDC by PID calculation every 10 seconds.
D.9.
Buzzer
If a command is received by the fan coil unit, the master unit will respond with 2 beeps for each setting, while the slave unit
will respond with 1 beep.
D.10.
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.
D.11.
On/Off Switch On The Front Panel
a)
This is a TACT switch to select Cool→Heat→Off operation mode
.
b)
In COOL mode, the set temperature of the system is 75 ºF with auto fan speed. There are no timer and sleep modes.
c)
In HEAT mode, the set temperature of the system is 75 ºF with auto fan speed. There are no timer and sleep modes.
d)
Master unit that does not use a wall pad will globally broadcast.
D.12.
Electric Heater Safety Switch
a)
Before the electrical heater is turned on, the EH safety switch must be closed and the fan RPM be more than
300RPM.If this contact is opened for ≥ 1 second or the fan RPM is less than 300RPM, the heater will be turned off
immediately and report an error. Once the contact is returned to the closed position ≥ 60 seconds, reset the error
and the heater will start again.
b)
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.