Desa CD32M (-1)(-2) - Manual (Page 15)

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OBSERVED PROBLEM POSSIBLE CAUSE REMEDY
• Pilot will not stay lit after
carefully following lighting
instructions.
• Pilot lit but no flame on the
burner.
• Frequent pilot outage problem.
• Defective pilot generator
(thermocouple).
• Remote or wires defective.
• Thermopile/Thermocouple not
generating sufficient millivoltage.
• Plugged burner orifice.
• Thermocouple not generating
sufficient millivoltage.
• Pilot flame maybe too low or
blowing (high) causing the valve
safety to drop out.
• Check pilot flame. It must
impinge on thermocouple.
• Clean or adjust pilot for
maximum flame impingement on
thermocouple.
• Ensure that the connection
between the valve and
thermocouple are tight and
secured.
• Check remote wires for proper
connections. Jumper wire across
terminals at remote control, if
burner comes on, replace
defective remote. If okay, jumper
wire across remote control at
valve, if burner comes on, wires
are faulty or connections are bad.
• Check thermopile with millivolt
meter. Take reading at
thermopile terminals of gas valve.
Should read 325 millivolts
minimum with remote control off.
Replace thermopile if reading is
below specified minimum.
• Check burner orifice for stoppage
and remove.
• Check thermocouple with
millivolt meter. Take reading at
thermocouple terminals of gas
valve. Should read 18 millivolts
minimum with remote control off.
Replace faulty thermocouple if
reading is below specified
minimum.
• Clean and/or adjust pilot flame
for maximum flame impingement
on thermocouple.