KeepRite mini split error code P9
AC contactor protection.
- TypeProtection
- SystemPower supply
- Can I fix it?Technician job
- Applies toDLC4 / DLF4 series, 2013 to 2015 (Gree-built)
What P9 means on a KeepRite
The drive detected a problem with the AC contactor or relay that feeds it (welded, open, or chattering).
On this platform, P9 is a protection: the system stopped or throttled itself to prevent damage; many clear on their own once conditions return to normal.
Common causes
- A failed contactor or relay on the outdoor board.
- Unstable supply voltage.
How to fix it yourself
Do the reset and the visual checks, but the underlying repair needs a technician with a meter and the service manual.
- Reset the system: switch the breaker (or the outdoor disconnect) off, wait a full five minutes so the boards fully discharge, then switch it back on and restart from the remote.
- If you own a multimeter and are comfortable using it, measure the supply voltage at the outdoor unit's L1 and L2 terminals with the unit running. A 230 V system should read roughly 208 to 253 VAC.
Switch off power at the breaker before opening either unit. Capacitors in the outdoor unit hold a charge for several minutes after power is cut.
When to call a technician
Board or contactor replacement by a technician.
Which KeepRite units show P9
This page applies to KeepRite DLCSRA / DLCSRB / DLCLRA outdoor with DLFSHA / DLFSFA indoor (2015 and later) and DLC4 / DLF4 (2013 to 2015) units on the DLC4 / DLF4 series, 2013 to 2015 (Gree-built). KeepRite's own documentation lists P9 as "AC contactor protection", the same definition used across the Gree platform it is built on. If your unit shows a code with a different shape (for example a four-character code, or a plain number), it is from a different table; use the lookup with your exact code.
Where KeepRite shows this code
DLC4 / DLF4 series, 2013 to 2015 (Gree-built): The code shows on the indoor unit's display in place of the temperature. If the display is off, press the Light button on the remote. Some models also count out the code as indicator blinks. E codes are system protections and faults, F codes are mostly sensor faults, H codes are outdoor and compressor protections, U codes are motor and valve faults, and P codes are power-supply faults.
Other KeepRite codes
Same part of the system as P9:
P9 on other brands
The same characters do not always mean the same thing. Check the brand on your unit.
- Blueridge P9 AC contactor protection
- Zone Air P9 Compressor drive abnormal load protection
- Mitsubishi Electric P9 Indoor pipe (condenser/evaporator) temperature sensor fault (open or short circuit)
- Trane P9 Compressor drive abnormal load protection / Indoor pipe (condenser/evaporator) temperature sensor fault (open or short circuit)
Questions people ask
Can I reset a KeepRite P9 code myself?
Yes. Turn the system off at the breaker for five minutes, then restart it. If P9 comes back, the fault is real and needs the checks above.
Is it safe to keep running a KeepRite showing P9?
Not repeatedly. A protection code means the unit stopped itself to prevent damage, and resetting it over and over can turn a cheap repair into a compressor failure. Reset once, check the basics, and stop if it returns.
What will a technician check for P9?
Board or contactor replacement by a technician. Ask for the measurements, not just a parts quote.
Sources
- ICP DLCSRA Outdoor Unit Single Zone Ductless Service Manual 32808000801 (error code table)
- ICP ductless installation instructions IM-KSAIC04-04 (DLCPRA / DLCSRB / DLCERB / DLCLRA error codes)
- ICP R-410A Ductless Split System Service Manual 421 01 9204 00 (DLC4 / DLF4, 2013)
Updated September 2026. Codes and definitions vary by model year. If your manual disagrees with this page, your manual wins. Send a correction.