Kaisai fault codes
What each code means, from Kaisai's own service literature, and which UK models it applies to.
Kaisai air conditioning
E0Indoor unit EEPROM parameter error (shows F4 at the outdoor board)8 modelsE1Indoor ↔ outdoor unit communication error8 modelsE2Zero-crossing signal detection error8 modelsE3Indoor fan speed out of range (shows F5 at the outdoor board)8 modelsE4Indoor room temperature sensor (T1) open/short8 modelsE5Indoor coil (evaporator) sensor (T2) open/short8 modelsE7Indoor PCB ↔ display board communication error8 modelsECRefrigerant leakage detection8 modelsF0Overload current protection8 modelsF1Outdoor condenser coil sensor (T3) open/short8 modelsF2Outdoor ambient sensor (T4) open/short8 modelsF3Compressor discharge sensor (TP) open/short8 modelsF4Outdoor EEPROM parameter error (shows E0 on the indoor unit)8 modelsF5Outdoor fan speed out of range (shows E3 on the indoor unit)8 modelsP0IPM malfunction / IGBT over-strong current protection8 modelsP1Over-voltage or too-low-voltage protection8 modelsP2High-temperature protection of the IPM module8 modelsP4Inverter compressor drive error8 models
Knowing the code is the easy half
A code names a symptom, not a root cause. The app takes the same code and walks the fix: what to measure first, the expected values for your exact model, and a verdict that tells you when the machine isn't actually broken.
Chase a Kaisai code on your machine →Free, no sign-up. Pick the model, put the code in, and it takes you through the chart where we hold one.
Or watch one get chased — free demo →
Or use it in your browser on any phone or laptop.