Flapper Valve Fault
Module 01
Check Flapper Valve
Check Flap Wiring
Check Flap Sensor
67 FAULT FINDING CHART - MAIN MENU CONT.
Master PCB Fault
Replace Master PCB
Blank Display
Flapper Valve Fault
Press Reset
If Fault persists
see Installation Guide
"Go to Frame 76
Flapper Valve Fault"
Module not connected
If Fault persists
see Installation Guide
Go to Frame 77
Module not Connected
Header Thmr Fault
If Fault persists
see Installation Guide
"Go to Frame 78
Header Thermistor
Fault
CUI Wiring Fault
If Fault persists
see Installation Guide
Go to Frame 78
Header Thermistor
Fault
Module not connected
Module 01
Check Module Wiring
Check Module PCB
Check Primary PCB
Header Thmr Fault
Check Header
Thermistor Wiring
Check Header Thmr
(8k to 30k at 20°C)
CUI Wiring Fault
Check CUI Wiring
Check CUI PCB
Check Master PCB
Power Off & On
No Heat Provided
Flow Temperature Setpoint cannot be
increased to 80°C
Go to Frame 80
No Heat Provided
Flow Temperature Setpoint cannot be
reduced to 30°C
Boiler does not respond to
0-10V Input
Go to Frame 81
Blank Display
Ensure Flow
Temperature is not
limited within Installer
Mode (see Frame 30)
Ensure Flow
Temperature is not
limited within Installer
Mode (see Frame 30)
Go to Frame 82
Does not respond to
0-10V
Master PCB Fault
If Fault persists
see Installation Guide
49
-
Installation & Servicing
FAULT FINDING
F
AUL
T FINDING F
AUL
T FINDING F
AUL
T FINDING F
AUL
T FINDING F
AUL
T FINDING F
AUL
T FINDING
Summary of Contents for EVOMOD 250
Page 59: ...59 Installation Servicing NOTES...
Page 60: ...60 Installation Servicing NOTES...
