ERROR CODES AND TROUBLESHOOTING
PAGE 31
ENGLISH
Error Codes and Troubleshooting
Yes
Yes
Yes
Yes
No
No
No
Yes No
No
Determine source of lost
power from OD unit or phase
imbalance from building power
Determine source of lost
communication from OD unit
Replace
PCB
Replace sensor
There is 230 VAC (+/- 10%) at terminal
strip connections 1(N) and 2(L), and
no more than a 2% deviation between
each leg and ground?
There is a pulsing 0 to 80
VAC between terminal strip
connections 1(N) and 3(C)?
There is 230 VAC at
terminals CN17 and CN21
on the PCB, and the LED
flashes 3 times per second
There is 5 VDC at CN6
across both sets of black
sensor wires?
The sensor resistance is
within 3% of the value listed
in the Service Manual sensor
resistance table?
Wiring and connections
are in good condition?
Check This First
Indoor Unit
Models:
AW24TL2HFA
AW30TL2HFA
AW36TL2HFA
ASYW24TRDFA
ASYW30TRDFA
ASYW36TRDFA
See following page for
wiring diagram, relevant
color-coded test
positions, and sensor
resistance values.
