Carrier bryant Multi-Zone 38MARBQ09 18AA3 Series Service Manual page 27

38MARBQ09~36AA3 Outdoor Units
Outdoor Fan Error F5
Error Code
Indoor Unit or Wired Control Display – F5
Malfunction decision conditions
Supposed Causes
Troubleshooting:
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?
18K ONLY - Ohm out reactor, remove wires first.
Reading should be close to Zero between
terminals. Also check each connection to ground,
this should be open. If not replace.
Replace fan motor and
Control Box Assembly
or Main PCB
! Attention:
When replacing Main PCB ONLY,
you will need Conductive Grease.
Error may only displayed every 3 minutes, during this time you may
see either "normal display" or "88" on indoor unit or wired control.
No
Yes
9K, 12K (120 & 220-Volt) 18K,
Replace Entire Control Box Assembly
24K, 30K, 36K
Replace Main PCB ONLY
F5 – Outdoor Fan Problem
Dr. Smart Display (Debugger) – E7 & E71
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 faulty
• PCB faulty
Dr. Smart
Display
Free up, replace any broken
parts so fan spins freely
Carrier Factory Authorized Parts
38AQ680001 Conductive Grease
If after parts replacement, F5 is
still displayed, contact your local
CE Technical Support Rep.
For Instructions on
how to change
Control Box or Main
PCB, see Table of
Contents in beginning
of this guide