LAARS NeoTherm NTV (Sizes 150–285 MBTU/h) - Service Manual - Manual (Page 61)

51 Service Manual NeoTherm 80 - NeoTherm 285
B34
Pump Fault
A problem with the circulator pump could appear as a
#79 error (Outlet High Limit). It could also appear as
a #63 error (LCI - Limit Control Input) if the interlock
loop includes a flow switch. The SOLA controller also
can display error #51 - Pump Fault.
No
No
Check for 120V at terminals
1 and 2 on TB5.
Pump is
getting power?
Disassemble and/or replace pump
Pump sounds
different?
No
Yes
Pump is
moving water?
No
Replace pump
Pump is
running?
Yes
Yes
Disassemble and/or replace pump