9.3 Fault finding
Hardware control components
Operations communication:
1.
The oven has two main parts being the QTS assembly (keyboard, screen, logic)
and the SRB (Smart Relay Board to switch and monitor the required operation).
2.
communicates information on the operation back to the QTS.
3.
The QTS and SRB have their own Personality Module (PM) fitted with the respec-
tive software to be able to communicate and work with each other.
The power provision to the QTS and the communication between QTS and SRB is
enabled via ONE cable with RJ45 connectors fitted.
Start up sequence
With the oven switch in the OFF position and the mains power ON, the QTS & SRB boards boot up.
When the oven switch is turned ON the splash screen briefly displays oven information and the cabinet
cooling fan is activated.
After completing a successful logic test, the safety relay is energised and the oven preheats or displays
a preheat temperature choice. Once preheated the oven displays the main menu if in "Full Service
Mode" or a recipe selection if in "Quick Service Mode".
Shutting down sequence
When the oven switch is turned OFF the screen displays ‘Shutting Down’ and the cooling fan operates
until the cabinet temperature has been sufficiently reduced (cavity temperature of 50°C / 122°F).
The safety relay is de-energised and the QTS & SRB boards remain active.
Exchanging data via USB interface
Procedures of exchanging data by using the USB memory stick:
Menu loading from the USB memory stick to the appliance (recipes / download)
Software loading from the USB memory stick to the appliance (firmware / download)
Error log saving from the appliance to the USB memory stick (upload)
Menu copying from the appliance to the USB memory stick (upload)
Recipe counter copying from the appliance to the USB memory stick (upload)
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