Hitachi RV-EX20 error codes & fixes
Choose an error code below to jump to the exact fix. If you’re not sure, use the model-scoped search.
Try E2, temperature, or won’t start.
Error codes
Pick your code to open the fix page.
Recently updated fixes
Fresh pages first — useful when you’re troubleshooting right now.
Hitachi RV-EX20 Error Code C28
Hitachi RV-EX20 error code C28 means battery is too cold. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C27
Hitachi RV-EX20 error code C27 means battery is too hot. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C23
Hitachi RV-EX20 error code C23 means unit has climbed onto a step. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C22
Hitachi RV-EX20 error code C22 means unit is stuck. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C21
Hitachi RV-EX20 error code C21 means wheels are lifted off the floor. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C20
Hitachi RV-EX20 error code C20 means sensors cannot operate on reflective/dark floors or in direct sunlight, the unit cannot move in tight spaces, or sensors are dirty. This guide explains…
Hitachi RV-EX20 Error Code C12
Hitachi RV-EX20 error code C12 means main power switch is OFF and charging cannot start. This guide explains the likely causes, the safest first checks, and when support or service is the b…
Hitachi RV-EX20 Error Code C10
Hitachi RV-EX20 error code C10 means main unit interior is too hot. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
All fixes for this model
One card per code. If a code has multiple variants, the card opens the filtered results list.
Hitachi RV-EX20 Error Code C28
Hitachi RV-EX20 error code C28 means battery is too cold. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C27
Hitachi RV-EX20 error code C27 means battery is too hot. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C23
Hitachi RV-EX20 error code C23 means unit has climbed onto a step. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C22
Hitachi RV-EX20 error code C22 means unit is stuck. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C21
Hitachi RV-EX20 error code C21 means wheels are lifted off the floor. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C20
Hitachi RV-EX20 error code C20 means sensors cannot operate on reflective/dark floors or in direct sunlight, the unit cannot move in tight spaces, or sensors are dirty. This guide explains…
Hitachi RV-EX20 Error Code C12
Hitachi RV-EX20 error code C12 means main power switch is OFF and charging cannot start. This guide explains the likely causes, the safest first checks, and when support or service is the b…
Hitachi RV-EX20 Error Code C10
Hitachi RV-EX20 error code C10 means main unit interior is too hot. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C07
Hitachi RV-EX20 error code C07 means front sensor is malfunctioning. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C06
Hitachi RV-EX20 error code C06 means bumper is malfunctioning. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C05
Hitachi RV-EX20 error code C05 means side brush is not operating. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C04
Hitachi RV-EX20 error code C04 means rotating brush is not operating. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C03
Hitachi RV-EX20 error code C03 means wheels are not operating. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Hitachi RV-EX20 Error Code C01
Hitachi RV-EX20 error code C01 means dust case is not installed or the handle is not upright. This guide explains the likely causes, the safest first checks, and when support or service is…
About this model
If your device shows an error code, start with the matching fix page. When a code returns repeatedly, it often points to an underlying cause (temperature, power delivery, sensors, locks, or wear).
Always follow basic safety: unplug before opening anything, and stop if you smell burning or see damage.