P46-T09110A Genuine Indoor Control PCB with EEPROM Data for Panasonic Air Conditioners S-125PE1R5A, Pre-programmed Main Board

Made for the A revision of the S-125PE1R5 indoor unit, P46-T09110A is a genuine Panasonic control PCB that arrives with its EEPROM data pre-loaded. The A at the end matters. The earlier S-125PE1R5 without a suffix takes P46-T09110, so read the full model off the indoor unit's rating label and confirm it ends in A before you place an order.

Signs the control board in an S-125PE1R5A has failed

Everything the indoor unit does runs through this PCB, from reading temperature sensors and driving the fan motor to exchanging signals with the outdoor unit and the wall controller. A failed board can leave the system with no power at the controller, an error code that won't clear, a fan that won't start, or a unit that switches itself off at random. Look closely at the old board for heat damage, corrosion, chewed wiring or a blown fuse. Lightning, supply surges, moisture and pests are frequent culprits, and dealing with the cause protects the new board.

Part details

• Genuine Panasonic part P46-T09110A
• Control PCB supplied with E2P (EEPROM) data
• Listed for the Panasonic S-125PE1R5A indoor unit
• Not for the non-A S-125PE1R5, which uses P46-T09110

Before you swap the board

Turn the system off, isolate it at the circuit breaker and give the electronics time to discharge. Label or photograph each connector, then lift the old board out by its edges. Ground yourself before touching the new PCB to avoid static damage. Once it's in, check every plug is fully seated before restoring power. Fitting should be done by a licensed air conditioning technician.

Questions about this part

Can I fit P46-T09110 to an S-125PE1R5A?

No. The two boards carry different EEPROM data, and Panasonic lists P46-T09110A for the A model. Fitting the wrong one may leave the unit running incorrectly or showing errors. Check the model on your indoor unit and order the matching board.