Checklist; Led Display; Normal Operation Mode - Fujitsu AJ*A72LALH Series Installation Manual

9. 3.

Checklist

Check description
1
High and low pressure values are normal.
Drain water is discharged smoothly through
2
the drain hose.
3
Indoor and outdoor unit fans are operating.
4
Compressor operates after the indoor unit operates.
Difference between inlet and outlet tempera-
5
tures is normal.
6
Error is not displayed
10.

LED Display

You can determine the operating status by the lighting up and blinking of the 7 segment LED display.
Check the status using the table below.
10. 1.

Normal operation mode

Mode
C L
H
Operation
En-42
Code
Cooling
t Heating
o r During oil recovery operation
d F During defrosting operation
P C During power saving operation
L n During low noise operation
S n During setting of snowfall mode
Check method
Check it with a pressure gauge.
Check it by pouring water.
Check them visually.
Check the operating sound.
Measure the inlet and outlet tem-
peratures.
Check the 7 segment LED display
Description
Criteria
Cooling: low pressure approx. 0.8 MPa
Heating: high pressure approx. 3.0 MPa
―
―
―
Temperature difference 10 degrees
Error blinking or no error code display