Mitsubishi Heavy Industries FDT28KXE6A Service Manual page 92

Error code
E46
Remote controller:
E46
7-segment display:
1. Applicable model
Outdoor unit
2. Error detection method
If the signal line of a outdoor
unit system applied automatic
address setting is connected to
other outdoor unit system
(Detected at indoor unit side)
3. Condition of error displayed
Same as above.
4. Presumable cause
• Mistake in the address setting
• Mistake in the connection of
signal wire
Note:
After completing the above procedure, reset the power and confirm that the error display does not recur. Unless the power
is reset for both indoor unit and outdoor unit, the set addresses will not be confirmed.
LED Green Red
Keeps flashing Stays Off
Indoor
Keeps flashing Stays Off
Outdoor
5. Troubleshooting
Save data for 30 minutes before stopping in Mente PC
Reset power supply and restart
Does E46 recur?
YES
Is't the
signal line of a outdoor
unit system applying automatic
address setting connected to
other outdoor unit
system?
NO
If signal line is connected to more than
2 outdoor unit systems, address setting
should be done by manually.
Is E46 still displayed?
YES
Turn ON the power of each outdoor unit
one by one and search the outdoor unit
that can start up with automatic address
setting
<Reference>
Error display at mixed address setting
Auto address setting
Manual address setting
–
Content
Mixed address setting methods
coexistent in same network.
Diagnosis
Caution:
Unless the power is reset after changing
address, the set address will not be
confirmed.
NO
YES
NO
Auto Manual
E31 E46
E46 Normal
90
–
Countermeasure
Check and save the data of
operating conditions
Check the address setting
method of faulty network
whether it is automatic
setting or manual setting.
Test run.
* No action is taken
because it is judged that
the power rest is not done
after changing address
Correct signal line
*In case of automatic
address setting, signal line
cannot be connected to
other outdoor unit system
Test run
Replace outdoor control
PCB*
(Rotary switch anomaly)
* Before replacement,
please confirm whether
the rotary switch for
address setting is not
damaged.
(It was experienced that
No.5 on rotary switch
was not recognized )