LAARS NeoTherm NTV (Sizes 150–285 MBTU/h) - Service Manual - Manual (Page 11)

1 Service Manual NeoTherm 80 - NeoTherm 285
A1
Troubleshooting - Start Here
For troubleshooting instructions, see these sections:
Section Symptom
Page
A2 Unit Will Not Fire, Blower is Not Running 2
A3 Blower Runs Continuously, No Display 4
A4 Control Unit is in “Standby” Mode 5
A5 Changing Control Settings, Change Not Complete,
Original (White) User Interface 7
A6 Unit is Running, but Building is Still Cold 8
A7 Control Unit Says “Run” but Boiler is Not Firing 9
A8 Open Safety Interlock Chain - Fault #63 9
A9 Short-Cycling - Fault #61 10
A10 Unit is Noisy 10
New installation,
never ran correctly
Old installation,
ran correctly
See “Quick Check of Components
in the Safety Chain and
Firing Sequence” - Section B1
Is this a new
installation?
Did the unit ever
run correctly?
What changed?
Operating conditions?
Did you change any control settings?