Airwell YBZE218-324-430, Service Manual

Page: 49 / 68

CONTROL SYSTEM
Service Manual
– YBZE DCI 1-A.1 GB
12-13
12.9.1 Installation Test
Installation test is to check any mistake in communication wiring or EEV wiring connections.
Start Installation Test:
RC setting: SPT=30, Cool Mode and press the button “-, +,-, +,-, +” continuously in 3 sec.
Unit operation during Installation test:
Unit will operate in cool mode (IFAN will stop), IDU will display “dd”. Total operating time depends
on IDU numbers, for each IDU maximum operating time is 3min.
Finish the Installation test:
IDU will cancel displaying “dd”, and will display “dn” if any mistake of communication wiring or EEV
wiring is detected from ODU.
12.10 Forced Deicing
Start Forced Deicing
Under Heat Mode, RC setting with SPT=16,
and press the button “+,-,+,-,+,-” continuously in 5 sec.
The Forced Deicing request will be sent to ODU.
After ODU received the Forced Deicing request, IDU will cancel the setting and request of Forced
Deicing
System operation will follow 12.7.6.2 and 12.7.6.3 during Forced Deicing.
12.11 Forced Mode (Compulsory operating function)
.
Entering into forced mode :
After the unit is powered for 5mins, press the light button on remote controller for 3 times in 3s
successively to enter into Freon recovery mode. “Fo” will be displayed. When Freon recovery mode
operated for 25mins, all loads will operate in cooling mode. (The setting fan speed is high fan speed
and the setting temperature is 16C )
Exiting forced mode:
Any signal from remote controller or button will exit the forced mode, and then the unit will operate
at the current setting command.
Forced mode will also be exited after operating for 25mins and then the unit will operate with the
last operating mode.
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