Troubleshooting - MHSC CDVR33 Installation And Operating Instructions Manual

TROuBlEShOOTING

STANDING pIlOT IGNITION
SyMpTOM pOSSIBlE CAuSE
1. Spark ignitor A. Wire disconnected.
will not light
pilot after B. Defective ignitor.
repeated
triggering of C. No gas or low gas pressure.
piezo.
D. No Propane/LPG in tank
2. Pilot will not A. Defective thermocouple
stay lit after
carefully fol-
lowing light-
ing instruc-
tions.
B. Defective valve
3. Pilot burning, A. Defective switch, wall switch,
valve knob
turned to
"ON", switch
is turned to
"ON" or "RS",
but burner
will not ignite. B. Pilot flame too small
C. Defective or malfunctioning
D. Defective valve
4. Frequent pilot A. Pilot flame may be too high or
outage prob-
lem.
5. The pilot and A. Inner vent pipe leaking exhaust
main burner
extinguish B. Horizontal vent improperly
while in oper-
ation C. Improper vent cap installation
69D0023
remote control or wire
thermopile
too low, causing pilot safety to
drop out
gases back into system
pitched
ACTION
A. Open door and check to make sure wire is connected to
ignitor.
B. Check for spark at electrode and pilot. If no spark and elec-
trode wire is properly connected, replace pilot assembly.
C. Check remote/manual shut off valve from fireplace. Low
pressure can be caused by bent lines, restricted lines, low
pressure line pressure. Consult with plumber or gas sup-
plier.
D. Check Propane/LPG tank. Refill tank.
A. Check that thermocouple flame impinges on thermocouple.
Clean and/or adjust pilot for maximum flame impingement.
Ensure that the thermocouple connection at the gas valve
is fully inserted and tight.
Disconnect the thermocouple from the valve, place one mil-
livolt lead wire on the tip of the thermocouple and the other
meter lead wire on the thermocouple copper lead. Start the
pilot and hold the valve knob in. If the millivolt reading is
less than 15 mV, replace pilot assembly.
B. If thermocouple is producing more than 15 mV, replace
faulty valve.
A. Check switch and wire for proper connection. Place jumper
wires across terminals of switch. If burner comes on,
replace defective switch.If the switch is OK, repeat the
same procedure on remote control If burner comes on,
replace remote control.
Place jumper wire across wire at gas valves (terminals
marked TH and TP/TH). If burner comes on, wires are
faulty or connections are bad. Replace wire.
B. If pilot flame is not close enough to the thermopile, adjust
pilot flame.
C. Check thermopile wire connections to make sure all are
tight and that the thermopile is fully inserted into pilot
assembly. Check thermopile with a millivolt meter. Connect
leads to TP and TP/TH terminals on the control valve. If
meter reading is below 325 mV, replace pilot assembly.
D. Turn valve knob to "On" and switch to "ON." Take a reading
at the thermopile leads (TP & TP/TH) on the valve. If the
meter reads greater than 175 mV and the burner does not
light, replace defective valve.
A. Clean and adjust the pilot flame for maximum flame
impingement on thermocouple.
A. Check for flue product leak. Replace defective pipe section.
B. Check horizontal-venting piping is running upward 1/4" per
foot. Do not run the pipe level or downward.
C. Check for proper installation and freedom from debris or
blockage
CDV Series Gas Fireplace
43