Unexpected Shut Off (Continued) - Linea PB

Unexpected Shut Off (Continued) - Linea PB

Review Unexpected Shut Off Guide for most common troubleshooting scenarios. Excessive liquid accumulation, accidental spills, or inadequate venting will cause moisture build up within the espresso machine leading to electrical shorts.... particularly at the AC terminal block and components. This troubleshooting article will guide you through several alternative symptoms, causes, and solutions to get the machine back up and running!

Alert
In the event of a reoccurring issue or emergency. Contact Black Rabbit Service's 7 Brew Support Team!
Symptom:
  1. Espresso machine is OFF.
Causes:
  1. Poor Espresso Machine Ventilation
  2. Over Pressure Scenario
  3. Excessive Water at Espresso Machine Outlet/Plug
    1. Pump not functioning.
Solution:
  1. Visually inspect machine for any leaks or drips.
  2. Clean and dry internal areas where water or liquid has accumulated.
    1. Drip & Cup Tray Cleaning
  3. Allow machine to 'cool down.'
  4. Flip Breaker Switch.
  5. Review Equipment Best Use Practices.
  6. Contact support.
Tools:
  1. Philips Head Screwdriver
  2. Dry Towels
Poor Machine Ventilation
As mentioned in the Best Use Practices and Cup Tray Cleaning guides. The cup tray panel is designed to warm dry items (such as cups) and act as the espresso machine's primary source of ventilation (hot air rises)!

Notes
If too many non-permeable or moisture producing items are kept on the cup tray. The espresso machine can develop an unsafe amount of internal moisture or reach an unstable temperature.

Cup Tray Characteristics:
  1. Perforated cup tray vents hot air produced by the espresso machine's boilers.
    1. Warms dry items such as cups!
  2. Tray liner (highlighted in yellow) collects small amounts of inevitable liquids.
    1. Under safe operating conditions, these liquids evaporate away and the cup tray liner is cleaned regularly:
      1. Cup & Drip Tray Cleaning


Idea
Tech Tip! It is common to leave a steam wand towel on cup tray. However, resting damp towel on a saucer or another, dryer, towel will reduce the presence of moisture. Always replace towel when it becomes soaked through!

Over Pressure Scenario
The espresso machine's steam boiler may over pressurize in one of two ways.
  1. Water overfills steam boiler.
    1. Visible at the Sightglass.
  2. Heating circuit fault.
In both scenarios, the Pressure Relief Valve will discharge excess steam as a safety precaution and error messages will be displayed.

Pressure relief valve is contained within the metal cylinder pictured above. A hose allows discharge steam and water to drain away from boiler.

Alert
In the event of an overpressure, contact support!

Excessive Water at Espresso Machine Outlet 
Commonly caused by backsplash during under counter cleaning. Excessive liquid at the espresso machine outlet or pump assembly may cause electrical faults.

If this has been determined to be the root cause, simply:
  1. Switch OFF espresso machine:
    1. Power Switch - Linea PB
  2. Unplug espresso machine plug from wall outlet.
    1. Espresso machine is plugged into the one and only large 6-50 outlet underneath the counter.
  3. Allow to dry.
  4. Verify breaker switch is switched ON:
    1. Breaker Panel
IdeaTech Tip! When cleaning. Be aware of the electrical outlets and wall mounted pump assembly (highlighted in yellow)!

Illustration may appear visually different than espresso machine plug & under counter fixtures.