Mitsubishi Electric Lossnay LGH-100RX4-E, Handbook

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4. Troubleshooting
4-1 Service Flow
Confirmation items
1
Condition of trouble – remote controller dis-
play, etc.
2 Frequency of trouble – date of start of opera-
tion and occurrence
3 Occurrence timing
4 Existence of drawings, equipment (including
controllers and equipment sold separately),
cables, wiring, and settings.
Applicable models
Lossnay
LGH-15 to 200RX
4
-E
Remote controller
PZ-41SLB-E
PZ-52SF-E
Trouble Mode 1 The system will not start properly.
• The check code display appears on the
remote controller.
• The LED of the Lossnay circuit board is
blinking.
Check with the check code list (table 2).
Trouble Mode 3 The remote controller does not operate or
operates irregularly.
The Lossnay does not operate or operates
irregularly.
Trouble Mode 4
Check with the remote controller checklist
(table 3).
Check with the Lossnay checklist (table 4).
Precautions when diagnosing malfunctions
●
When removing a transistor or printed circuit board, make sure the breaker is thrown.
●
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 2 to 3 times before starting repairs.
●
If a malfunction of the printed circuit board is suspected, check for disconnected wires in the print pattern, burnt parts or dis-
coloration.
●
If the printed circuit board is replaced, make sure that the switch settings on the new board are the same as the old board.
—20—
• Check the initialization checklist from
installation to operation (table 1-1).
• Check the system checklist (table 1-2).
Trouble Mode 2