ESIE15-11A | Part 2. Troubleshooting 2. Error code based troubleshooting
Page 18 23/09/16
VRV4 indoor units
2. Error code based troubleshooting
Error code
Main Sub Status outdoor Reset Cause Solution
A0 - Thermo off O Power
off/on
Fault board Check setting 22-1-3: T1-T2 NC.
If correct, indoor board fault.
A1 - Thermo off O Power
off/on
Fault Eeprom Replace board.
A3 - Cool thermo off Auto
recovery
Float switch open
during thermo on
(cooling)
Check float switch status, drain
pipe no blockage, drain pipe raiser
< 600 mm.
A6 01 Thermo off BRC1.. Fan motor locked Rpm counter no signal from motor
to indoor main board when output.
10 Thermo off BRC1.. Fan motor overcurrent Check motor power circuit.
Replace fan motor / indoor board.
11 Thermo off BRC1.. Fan motor locked Rpm counter no signal at off
condition.
A7 - Warning BRC1..
Off/on
No detection contact
swingmotor
Check swing motor run when
output 230VAC.
Check contact position detection
open & close.
A9 01 Thermo off O Power
off/on
EV motor fault
detection
Check signal board to expansion
valve.
02 Thermo off O Power
off/on
EV body leakage Check temperature coil sensor at
close EV cooling other indoor
AF Thermo off BRC1.. Float switch open
during thermo off
Check for drain water returning
from other indoor, expansion valve
correct closing thermo off.
AH 03 Warning BRC1.. Communication error
main PCB / self
cleaning PCB
Check wire harness connections.
04 Warning BRC1.. Dust detection sensor
error
Check wire harness connections.
05 Warning BRC1.. Dust collection error Check for clogging by dust
between brush-arm and dust
collector box.
06 Warning BRC1.. Air filter rotation error Check rotation mechanism air
filter.
07 Warning BRC1.. Damper rotation error Check rotation mechanism
damper.
08 Warning BRC1.. Filter cleaning time
error
Filter auto cleaning program could
not be performed 24 hr operation.
09 Warning BRC1.. Auto self cleaning
disabled
Check field settings to enable auto
filter cleaning.
AJ 01 Thermo off Auto
recovery
Capacity adaptor
missing
Add corresponding capacity
adaptor onto spare part PCB
02 Thermo off Power
reset
Incorrect expansion
valve motor
Use correct expansion valve
motor (between gear type and
direct drive).
C1 01 Thermo off Auto
recovery
Communication error
main PCB / inverter
PCB fan motor
Check for communication between
main PCB and inverter PCB fan
motor.
02 Thermo off Auto
recovery
Communication error
main PCB / auxiliary
PCB
Check for communication between
main PCB and inverter PCB fan
motor.
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