Fault Solution Sections - ECR International Utica Boilers MAH-125 Installation, Operation And Maintenance Manual

Fault Finding Solutions Sections
A
Power supply 120V
1. Main terminals L and N
2.
Integrity of the fuse
3.
PCB - X1 0 connector
Mains terminals L & N
B
120V at PCB -connector x13 pump terminals Blue
to Brown (See Wiring Diagram)
NO
Replace PCB
C
Fan connections correct at fan and PCB
1.
Connectors X11 & X23 See Wiring Diagram
YES
Is there 120V AC at fan terminals connector
X11 blue to brown. See Wiring Diagram
NO

FAULT SOLUTION SECTIONS

NO
Check electrical supply
NO
Replace fuse
NO
Check wiring
120V between PCB -connector x13 pump
terminal Blue and PCB -connector x11 pump
terminal Black.
(See Wiring Diagram)
NO
Make connections
YES
Replace PCB
41
Connection OK at
connector x1 0
YES
Display
illuminated
NO
Replace PCB
Fan jammed of faulty winding
Main or Display
PCB fault
120V at
Pump
NO
Check wiring Replace
Pump
YES
Replace fan
PN 240011430 REV. M [06/30/2019]