Troubleshooting - Mr. Heater MH12HB Instrucciones De Uso Y Manual Del Usuario

7 Inspect and clean main burner orifice (threaded into
orifice holder). Orifice holder is attached to the burner
assembly venturi with (2) two screws.
8 Inspect and clean pilot (mounted to bracket) by using a
vacuum or apply air pressure through the holes in the
pilot indicated by the arrows in Figure 6.
WARNING: Never use needles, wires, or similar cylin-
drical objects to clean the pilot to avoid damaging the
calibrated orifice that controls the gas flow.
9 Apply air pressure (max. 30psi) into ceramic tile of
burner assembly and the venturi tube (ref. item #24) to
remove dust, lint or spider webs.
10 Reassemble main burner orifice holder onto the burner
assembly.
11 Reinstall burner assembly into the heater housing
12 Reinstall fuel line and check for leaks.
13 Install heater back cover.
14 The MH12HB heater should be stored in an MH12HB
storage bag (not included).
TROUBLESHOOTING INFORMATION:
If Spark electrode does not produce spark.
CHECK
• Spark electrode broken – replace ODS (Oxygen Depletion
Sensor).
• Igniter wire may not be attached to spark electrode,
ground wire may not be attached to frame - attach.
• Igniter wire damaged – replace.
• Pulse ignition battery dead -- replace battery
If Spark electrode produces spark but pilot does not light.
CHECK
• No gas to heater – install disposable cylinder or connect
hose and turn on valve at remote cylinder.
• "PILOT" position not properly aligned – turn gas control
knob to "PILOT" position and depress.
• Pilot is blocked from spider web or dirt – clean pilot, see
MAINTENANCE.
If Pilot flame does not stay lit when knob is released.
CHECK
• Control knob in "PILOT" position not completely
depressed or held in long enough to purge air from lines.
• Pilot flame not surrounding thermocouple – clean pilot,
see MAINTENANCE.
• Pilot Assembly defective – replace.
•
Tip switch wires disconnected – connect.
If Main burner does not ignite.
CHECK
• Main burner orifice is blocked – clean burner, see
MAINTENANCE.
If Heater keeps shutting "OFF" during normal operation.
CHECK
• Pilot is blocked – clean pilot, see MAINTENANCE.
• Provide minimum fresh air opening of 9 square inches
(example 3" x 3" opening).
Mr. Heater | Portable Propane Heater
• Tip over switch activated from bumping heater. Re-light
• Regulator defective - Replace regulator.
• Internal contamination - Replace control valve and
regulator.
• Call Technical Services for additional information.
7
Operating Instructions and Owner's Manual