Sanyo Air Conditioning Fault Codes Explained

If you’re seeing a Error code on your Sanyo AC system and don’t know what it means, here’s a quick breakdown. This guide will help you understand what the issue might be, whether it’s a sensor, communication issue, or configuration error.

E Series – Communication & Addressing Errors

E01–E03: Issues between remote controller and indoor unit. Check for address mismatches or incomplete auto addressing.
E04–E07: Outdoor unit can’t send/receive signals from indoor units.
E08–E09: Duplicate address setting on indoor units or controllers.
E10–E12: Signal communication errors with external options or interference from another system during auto addressing.
E14–E20: Auto address problems. Could be due to wrong unit settings or incomplete system setup.
E24–E26: Problems between main and sub outdoor units during auto address setup.
E29: Sub outdoor unit is not receiving signals from the main outdoor unit.

F Series – Sensor & Thermistor Faults

F01–F03: Indoor coil temperature sensor issues.
F04–F08: Outdoor sensor faults – discharge, coil, or air temperature sensors may be disconnected or faulty.
F10–F11: Indoor room or discharge air sensor fault.
F12–F26: Outdoor temperature sensors (multiple areas) are either open-circuit or faulty.
F29: Indoor EEPROM (memory chip) fault.
F31: Outdoor EEPROM fault.

H Series – Compressor Protection & Oil Faults

H01–H03: Compressor 1 problems – overload, lock, or no current.
H05–H08: Sensor or oil protection faults on Compressor 1.
H11–H13: Same issues, but for Compressor 2.
H15–H23: Problems with Compressor 2 or 3 – protection trips, current issues, or sensor faults.
H25–H28: Discharge temperature or oil sensor issues.
H31: IPM (Intelligent Power Module) trip – usually from overcurrent or overheating.

L Series – Misconfiguration & Wiring Errors

L02–L03: Indoor/outdoor unit mismatch or duplicate main unit settings.
L04–L06: Address or operation priority conflicts.
L07–L13: Group control or capacity settings are wrong or missing.
L17: Outdoor units with different refrigerants are connected (not allowed).
L18: 4-way valve failure.

P Series – Thermostats, Fans & Other Protection Errors

P01–P02: Thermostat triggered from fan or compressor overload.
P03–P05: Discharge temp or power-related issues like high pressure or open phase.
P09–P12: Indoor issues like ceiling panel connection, float switch trigger, or fan overload.
P16: Compressor wiring phase issue or startup failure.
P17: Compressor 2 discharge temp error.
P22: Fan motor or HALL sensor failure.
P26: Overcurrent detected when compressor runs too fast.
P29: Inverter error – compressor not running.
P31: Flexible control error – signal or setting issue.

Need to Reset the System?

Before doing anything else, make sure the issue isn’t just a temporary signal or power glitch. Try powering down the system completely for a few minutes and then restart. If the error comes back, the code gives you a clue where to look.

This guide is here to help you understand what the error code means, but always consult a qualified AC technician before diving into repairs or rewiring.