Troubleshooting - Mitsubishi Electric LOSSNAY LGH-F300RX5-E Handbook

7. Troubleshooting

Work precautions
• When removing or touching a transformer, printed circuit board or other parts, make sure to turn off the
power supply isolator.
• When removing the circuit board, always hold it at both ends and remove carefully so as not to apply force
to the surface mounted parts.
• When removing the circuit board, be careful of the metal edges on the board.
• When removing or inserting the connectors for the circuit board, hold the entire housing section. Never pull
on the lead wires.
• When servicing, be sure to recreate the malfunction two or three times before starting repairs.
• If it is thought that there is a printed circuit board malfunction, check for disconnected wires in the print pat-
tern, burnt parts or discoloration.
• If the printed circuit board is replaced, make sure that the switch settings on the new board are the same as
the old board.
7-1 Service Flow
Confirmation items
1 Condition of trouble - remote controller
display, etc.
2 Frequency of trouble - the date of starting
operation and occurrence of trouble
3 Occurrence timing
4 Existence of drawings:
equipment ( including controllers ) , cables,
wiring, and settings.
Applicable models
Lossnay
LGH-F300 to F1200RX
Remote controller
PZ-60DR-E
PZ-41SLB-E
PZ-52SF-E
-E
5
Troubleshooting 1
Yes
Troubleshooting 2
No
Troubleshooting 3
No
Troubleshooting 4
No
This is normal.
─ 37 ─
The system will not start properly.
No
• Check the initialization checklist from
installation to operation (Table 1-1-1 to 1-1-4 ).
• Check the system checklist (Table 1-2-1 to 1-2-2).
• An error code displays on the remote
controller.
• The LED on the Lossnay circuit board is
blinking or lit up.
Yes
Check the checklist of error codes and
LED displays (Table 2-1 to 2-2).
The remote controller operation is
disabled or irregular.
Yes
Check the checklist for the remote controllers
(Table 3-1 to 3-2).
The Lossnay operation is disabled or
irregular.
Yes
Check the Lossnay checklist (Table 4).