mundoclima H11 Series, Service Manual, Page: 46 / 73

10.3.1.3 Indoor f an speed has been out of control (IDU E3/
EH 03
)
Power off, then restart the
unit 2 minutes later. Is it still
displaying the error code?
Power off, then restart the
unit 2 minutes later. Is it still
displaying the error code?
S hut off the power supply,
rotate the fan by hand. Does
it rotate properly?
Shut off the power supply,
rotate the fan by hand. Does
it rotate properly?
T he unit operates normally.
The unit operates normally.
F ind out the cause and
have it solved. For
example,
whether the fan
is blocked or the screws
which fix the fan are
tighten.
Find out the cause and
have it solved. For
example,
whether the fan
is blocked or the screws
which fix the fan are
tighten.
C heck the wiring of fan
motor. Are all the
connections good?
Check the wiring of fan
motor. Are all the
connections good?
No
Yes
No
C orrect the connections.
Correct the connections. No
R eplace the fan motor
Replace the fan motor
Yes
Yes
R eplace the main PCB
Replace the main PCB No
heck whether the main PCB
is normal through index 1?
Check whether the main PCB
is normal through index 1?
Yes
No
Index 1:
1: Indoor AC fan motor
Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure
the voltage of pin1 and pin2. If the value of the voltage is less than 100V(208~240V power supply)or
50V(115V power supply), the PCB must have problems and need to be replaced.
Service manual
MUEX-
H11 series
45