IDEAL EVOMOD 250 - Page 56

81 NO DISPLAY
Supply power to the boiler
no
Is there 230Vac to the boiler at (B)?
yesyes
Connect the wiring from the Installer
Wiring Box to the Master PCB Box
no
Is there 230Vac to the boiler at (C)
yesyes
Connect the cable from the main PCB to
the user interface PCB securely
no
Is the cable from the main PCB to the user interface
PCB connected securely?
yesyes
Replace cable from main PCB to user
interface PCB
no
Does the cable from the main PCB to the user interface
PCB have continuity and is un-damaged?
yesyes
Replace main PCB
no
Replace the user interface PCB, still no display?
Master PCB Box
C
Installer Wiring Box
Master PCB Box
B
56
- Installation & Servicing
FAULT FINDING
FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING