P46-T09110 Genuine Indoor Unit PCB with EEPROM Data for Panasonic Air Conditioners S-125PE1R5, Programmed Control Board

P46-T09110 is a genuine Panasonic circuit board for the S-125PE1R5 indoor unit, supplied with its E2P (EEPROM) data already loaded. That data holds the model specific settings the board needs to run this unit correctly. The later S-125PE1R5A uses a different board, P46-T09110A, so read the exact model from your indoor unit's label before ordering.

Panasonic S-125PE1R5 indoor board faults

This board is the brain of the indoor unit. It reads the room and coil sensors, takes commands from the controller, runs the indoor fan and talks to the outdoor unit. When it fails, the system may be completely dead, refuse to respond to the controller, show communication or sensor errors, or run the fan at the wrong speed. Burnt tracks, a blown fuse or a scorched smell around the board are clear warning signs. Many board failures trace back to a power surge, insects or water getting into the electrics, so look for the cause before fitting the replacement.

Part details

• Genuine Panasonic part P46-T09110
• Indoor unit control PCB with E2P (EEPROM) data loaded
• Listed for the Panasonic S-125PE1R5 indoor unit
• The S-125PE1R5A takes P46-T09110A instead

Fitting the new PCB

Isolate the air conditioner at the circuit breaker and wait several minutes before opening the electrical box. Photograph every plug, sensor and wire on the old board, and wear an anti-static strap or touch an earthed point before handling the new one. Transfer any jumper or switch settings exactly as they were. A licensed air conditioning technician should fit the board and test the system afterwards.

Questions about this part

What does with E2P data mean?

E2P is short for EEPROM, a memory chip on the board. Panasonic supplies this PCB with the data for the S-125PE1R5 already programmed, so the board is matched to that model. That's why the board numbers differ between model versions.