Carrier bryant Multi-Zone 38MARBQ09 18AA3 Series Service Manual page 11

40MAQ High Wall
Indoor Fan Error – E3 (page 1 of 2)
Error Code
Indoor Unit or Wired Control Display – E3
Malfunction decision conditions
Supposed Causes
Troubleshooting:
Follow the "1st Steps for DLS Troubleshooting"
in the beginning of this guide, if you have an
active error, procedure below.
Shut OFF the power supply.
Rotate the Indoor fan by hand.
Does the fan rotate freely?
With power still OFF, open
MAQ, remove outer cover
and electrical cover.
E3 – Indoor Fan Problem
Dr. Smart Display (Debugger) – E3
When the indoor fan speed is too slow (300 RPM
or less) for 3 minutes or more, the unit stops and
the LED displays the Error Code for 30 seconds.
Then retries until locks out.
• Wiring mistake
• Fan motor stalled or faulty
• PCB faulty
E3 error on a MAQ will lock out the system and
display E3 until error is fixed or system restarted
No
Yes
Dr. Smart
Display
Free up, replace any broken
parts so fan spins freely
Locate Fan Harness
1 - Red
3 - Black
4 - White
5 - Yellow
6 - Blue
Continued on next page