A miniature circuit breaker (MCB) on the mains unit has tripped to the OFF position

Possible cause: A fault has developed in the 230V circuit protected by that MCB, or too many appliances are drawing power at once.. Eliminate the fault (or reduce the load) before re-setting — switch the MCB back to the ON position against the spring pressure in an upwards direction.

The RCD (residual current device) does not switch off when the test button marked 'T' is pressed

Possible cause: The RCD unit itself is faulty.. Do NOT use the mains supply system. Call a qualified electrician.

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Bailey • Approach • Electrical System

Bailey 230V/12V Electrical System & Control Panels (2013 Model Year, Approach)

Sourced from Bailey's 2013 model year owner's manual for the Approach range. If your motorhome is a different age or range, some details — such as the exact control panel brand or chassis-component generation actually fitted — may not match. Always cross-check against the handbook that came with your specific motorhome.

View official manual on manufacturer's site ↗

Parts & Appliances Fitted

Master Troubleshooting & Diagnostics Matrix

Error Code / Indicator	Symptom / Meaning	Step-by-Step DIY Fix	Suggested Actions
`N/A`	A miniature circuit breaker (MCB) on the mains unit has tripped to the OFF position Possible Cause: A fault has developed in the 230V circuit protected by that MCB, or too many appliances are drawing power at once.	Eliminate the fault (or reduce the load) before re-setting — switch the MCB back to the ON position against the spring pressure in an upwards direction.	DIY Safe
`N/A`	The RCD (residual current device) does not switch off when the test button marked 'T' is pressed Possible Cause: The RCD unit itself is faulty.	Do NOT use the mains supply system. Call a qualified electrician.	Professional Intervention Required