Re-Verber-Ray MP-25-80N Insert Manual page 24

4.0 Troubleshooting Guide
Continued from Page 22
Yes
Does the burner
No
ignite?
Pressure switch may be faulty or
Yes
there is a restriction in the exhaust.
Confirm inlet is within minimum
and maximum inputs as indicated
on the rating label.
Is the gas pressure ok?
Does the burner
No
stay lit?
Yes
Is the heater
output consistent
No
with prior
operation?
Yes
Does the heater
stay on until the call
for heat ends?
Yes
No
Troubleshooting ends.
For additional information, contact your local
representative or the factory for assistance.
Turn on the gas supply line.
Is the gas supply valve
to the heater in the "on"
position?
Yes
Yes
Check inlet pressure to the
heater. Is it within the minimum
and maximum allowable range
No
Does the burner light and
then shut off immediately
(1-2 seconds)?
Re-cycle the unit. Check
manifold pressure during
start-up. Is it with the ranges
specified on the rating plate?
No
Check inlet pressure to the
heater. Is it within the minimum
and maximum allowable range
as per the rating plate?
No
Adjust inlet pressure.
24
Continued from Page 22
Check the voltage at
No
the relay coil during the
as per the rating plate?
Does the burner stay
on for approximately
Yes
8 seconds and then
Check modulating controller for
flash codes. Consult factory.
Consider the following:
• Change mode selection.
Yes
• Addition of a room thermistor.
• Addition of wind barriers.
• Check heat loss calculation.
• Consult factory.
Partial blockage in the venting may
Yes
be present. Check for obstructions
The heater can shut down or stay on due to:
• Improper grounding.
• Faulty control device.
• High winds.
• Taking combustion air from the attic.
• Dirty environment.
• Improperly positioned baffles.
• Fluctuating gas pressure.
MP Series
Yes
ignition sequence.
Is it 120VAC?
shut off?
No
and check flash codes.
Yes
No
No
Yes
Yes