Dru Metro 100 Tunnel Installationsanleitung Seite 18

Problem
E. No pilot burner fl ame
F. Electronics keep spar-
G. Pilot burner is burning,
H. There are short sound
I.
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Possible cause
1. Air in the pilot burner pipe.
2. Thermocouple wires switched.
3. No spark at the pilot burner.
4. Injector is blocked up.
1. Receiver is damaged.
king while the pilot
burner is ignited
1. Thermocouple does not func-
but magnetic valve clo- tion.
ses after ca. 10 seconds
or when the appliance
gets hot
2. Batteries (almost) empty.
1. Batteries (almost) empty.
signals, but no sparks
and no sound / clicks
can be heard of the
magnet opening the
valve
Pilot burner is burning, 1. Button A in position MAN.
but there is no gas fl ow
to the main burner 2. Appliance in the pilot fl ame
position.
3. Pre-pressure of the gas is too
low.
4. Damaged magnetic valve.
Table 4: Diagnosis of malfunctions
Remedy
1. Flush the pipe or start the ignition process
several times.
2. Check the polarity of the thermocouple wiring.
Connect the thermocouple wiring properly, if
necessary.
3.1 Check if the ignition cable (S) is lying free from
metal parts; see fi g. 20.
If necessary, move it away from the metal
parts.
3.2 If necessary, replace the ignition cable.
3.3 If necessary, replace the ignition pen.
4.1 Clean the injector.
4.2 If necessary, replace the injector.
1. Replace the receiver and confi rm the code
(remedy 1 at A)
1.1 Measure the voltage, using a digital multime-
ter, set to mV range, by connecting the cables
to the cable shoe. The cable shoe is located on
the outside, directly next to the magnet nut at
the rear of the gas control; see fi g. 23.
The voltage should be at least 5mV within 20
seconds.
It may not be lower when the appliance is
warm.
If the voltage is too low:
- the thermocouple should be placed better in
the fl ame or
- the thermocouple should be replaced.
1.2 Check the size of the pilot burner fl ame.
Correct a fl ame that is too small.
1.3 Check the wiring of the thermocouple to the
receiver.
If necessary, replace the wiring.
2. Replace the receiver's batteries.
!Caution Avoid short circuit between the batteries
and metal parts of the appliance.
1. Replace the receiver's batteries.
!Caution Avoid short circuit between the batteries
and metal parts of the appliance.
1. Turn button A on the gas control to ON; see
fi g 20.
2. Increase the fl ame height by pressing button
(large fl ame) on the remote control.
3. Check pre-pressure.
If necessary, contact gas company.
4. Replace the gas control.
M E T R O 100 - I N S TA L L AT I O N M A N UA L
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