2-38
027 E805
（FA sensor built in the unit only）
Alarm
Logic
FA sensor failure
Possible
Causes
1. Incorrect setting
2. FA wiring is installed incorrectly.
FA sensor failure
3. Controller (CPU board) failure
Trouble
Shooting
1-1. Check FA sensor setting.
HIGH-FLY: With FA sensor (Ventilator with insect screen)
HIGH: With FA sensor (Ventilator without insect screen)
OFF: Without FA sensor
＊ Confirmation of setting: 2.3 ※4 Configuration Set
Information
1-1. Change setting as correct ：※ 12
Configuration Set in paragraph
2.3.
1-2. Check if FA setting made "HIGH-FLY" or "HIGH" for
unit without FA sensor.
1-2. Set to "OFF" if FA setting made
"HIGH-FLY" or "HIGH".
2. Turn on the circuit breaker and check if there is DC5V
input from the controller.
FAS：X8A No.4-6（Red-Black）
X8A
CPU
board
FAS
Black
Blue/Red
Blue/Yellow
V
DC5V
2
4
6
1
3
5
B–B/R
B-B/Y
：Input Voltage DC5V
：Output Voltage
2. If there is no input DC5V, then
check the controller.
If there is input DC5V, then
proceed to next step.
3. Make sure that the FA wire is properly attached to the ventilator outlet.
Operate the ventilator outlet lever to fully open and fully close. If an alarm is detected, replace
the FA sensor.
Controller
Action
E805 Alarm display only
028 E807
（FA sensor built in the unit only）
Alarm
Logic
Ventilator is open during frozen operation.
Possible
Causes
Ventilator is still open when the unit is in frozen mode
Trouble
Shooting
Make sure to fully close ventilator in frozen operation
If the ventilation volume is displayed regardless of the valve being fully closed, perform the FA
Calibration under 4.1 Manual Check.
Controller
Action
E807 Alarm display only
02章19-44LX10F11B3TR16-02En.indd2-3802章19-44LX10F11B3TR16-02En.indd2-38 2016/02/0217:17:412016/02/0217:17:41
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