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74 Outdoor Unit
Test Run
Sensor Checking Function
Sensor checking function judges whether the current temperature of indoor and outdoor unit sensors is right
or not. -3 indoor temperature sensors, 9 outdoor temperature sensors, 2 outdoor pressure sensors.
It is used for judging sensor abnormality. Note 2)
Note 1)
Wait for 3 min. after power
reset
Note 3)
Start
Main PCB
SW01S
Set the dip S/W according to the function
Sensor Checking ➠ Refrigerant Auto Charging : 1,2,7 ON
Sensor Checking ➠ Refrigerant Checking : 1,2,7,14 ON
Main PCB
SW01B
SW02B
Press the black button for 2 sec. on main PCB.
Main PCB
SW01V
Indoor/Outdoor units operate with
air circulation mode
Refrigerant Auto Charging
Press the black button
until '508' is displayed
Judging sensor
normality
Error Display
Refrigerant
Auto Charging
Main pcb
LED
Note 4)
Press the black button on the main PCB for 2 sec.
Main PCB
SW01V
Press the black button for 2 sec. after turning off all
of dip S/W.
Refrigerant Checking
Press the black button
until '608' is displayed.
Refrigerant
Checking
Don>t Perform Sensor Checking
No
Yes
Yes
No
Completed.
Note
1. Sensor checking function is used with Refrigerant
Checking and Refrigerant Auto Charging.
2. Check abnormal sensor
3.
It is displayed at the LED on the main PCB at each step.
4. Refer to the next page for sensor error code part
Caution
1. Confirm auto addressing has been performed (Check
installed number of IDU).
2. The error can be displayed even if the sensor is
normal according to installation and temperature
condition. If error occurs, check the sensor and
judge abnormality.
Would you perform
the Sensor
checking!
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