Heat Controller A-DVC24SD-1 - Fan Speed is Out of Control Diagnosis (E3)

36
DVC/DVH Inverter Mini-Split Heat Controller
34
10.3.4 Fan Speed is Out of Control Diagnosis and Solution (E3)
Error Code
E3
Malfunction decision
conditions
When indoor fan speed runs at 300RPM or lower for certain
period of time, the unit will stop and the LED will display the
failure.
Possible Causes ● Wiring error
● Faulty Fan Assembly
● Faulty Fan Motor
● Faulty PCB
Trouble shooting:
Shut off the power supply
and turn it on 5 seconds
later. Is it still displaying
the error code?
Shut off the power supply,
rotate the fan by hand.
Does it rotate properly?
The unit operates normally.
Find out the cause and
have it solved. For
example, check
whether the fan is
blocked or the bearing
is broken?
Check the wires of fan
motor. Are all the
connections good?
No
Yes
No
Correct the connections.
No
Yes
Check whether the main PCB is
normal through index 2?
Yes
Yes
Check whether the fan
motor is normal through
index 1?
Yes
Replace the fan
motor
Replace the
main PCB.
The
malfunction is
solved?
No
No
If the
malfunction is
still existing,
replace the
main PCB
No
Note: See next page for information pertaining to Index 1 and 2.
If the malfunc-
tion is still
exists,replace
the main PCB
Find out the cause and
trytoxit.Forexample,
checkwhetherthefan
is blocked or the
bearingisbroken?