Error Code [4115] (Tlmu); Error Code [4115] (Ylmu) - Mitsubishi Electric R410A Service Handbook

[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-5-5

Error Code [4115] (TLMU)

1. Error code definition
Power supply signal sync error
2. Error definition and error detection method
The frequency cannot be determined when the power is switched on.
3. Cause, check method and remedy
Cause
(1) Power supply error
(2) Noise filter problem
Coil problem
Circuit board failure
(3) Blown fuse
(4) Wiring failure
Between noise filter board CN012 and con-
trol board CNAC
(5) Control board failure
7-5-6

Error Code [4115] (YLMU)

1. Error code definition
Power supply signal sync error
2. Error definition and error detection method
The frequency cannot be determined when the power is switched on.
3. Cause, check method and remedy
(1) Power supply error
(2) Noise filter problem
Coil problem
Circuit board failure
(3) Blown fuse
(4) Wiring failure
Between noise filter CN6, noise filter CN2, transformer
box, and control board CNAC
(5) Control board failure
HWE14080
Check the voltage of the power supply terminal block (TB1).
Check fuse F01 on the control board.
Check noise filter fuses F001 and F002.
Confirm that the voltage at the control board connector CNAC is
188 V or above.
If none of the items described above is applicable, and if the trou-
ble reappears even after the power is switched on again, replace
the control board.
Cause
- 171 -
Check method and remedy
Check the coil connections.
Check for coil burnout.
Confirm that the voltage at the CN012 connector is 188 V or
above.
Check that the voltage at noise filter board connectors TB21 to
TB23 is 188V.
Check method and remedy
Check the voltage of the power supply terminal
block (TB1).
Check the coil connections.
Check for coil burnout.
Check that the voltage across TB21 and TB22 on
the noise filter board is 414V or above.
Check F01 on the control board, F4, and F5 for a
blown fuse.
Confirm that the voltage at the control board con-
nector CNAC is 190 V or above.
If none of the items described above is applicable,
and if the trouble reappears even after the power is
switched on again, replace the control board.
GB