VERDER CARBOLITE GERO ABA 7/35B, Installation, Operation And Maintenance Instructions, Page: 27 / 94

5.0 ABA Operation
This section describes how to heat the chamber up to temperature and how
the automatic door locking system operates.
5.1 Switches - Control Panel
The main control switches are on the left hand side of the control panel (see Fig 33.).
Fig 33 - Mains switch panel
Fig 34 - Electrical Shock
Warning Lights
The 'instrument switch' cuts off power to the controllers, other devices (including the
balance) and heating circuit contactors.
The 'safety circuit test switch' is used to check the operation of the two red
warning lamps referred to in section 4.0 (see both Fig 33. and Fig 34.).
The heater lamps indicate when the power control relays are on; they flash while the
chamber is heating or maintaining temperature. They are also used to diagnose faults –
see section 27.0.
5.2 Door Operation and Status Display
In previous models ‘door open’ and ‘door locked’ indicator lamps were positioned above
the ‘Electric shock risk’ lamps on the upper right front of the furnace. These door status
indicators are now included (see Fig 32. and Fig 36.) in the status bar at the top of the
touch screen display panel.
When the door is open power to the main chamber elements are automatically cut off.
If a fault occurs then one or both of the red warning lamps above the door on the left
(see Fig 34.) will light up. These warning lamps should be tested daily by pressing the
test switch on the lower mains switch panel (see Fig 33.) when the door is closed and no
test is operating.
27
5.0 ABA Operation