Karcher HDS 12-14-4 ST Gas - Manual (Page 33)

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ƽ
Danger
Risk of injury! The main switch of the vacuum cleaner is to be
switched off or the Cekon plug must be unplugged while carrying
out any repairs or maintenance jobs.
*
Note
Press unlocking key for exhaust gas thermostat (J) to unlock the
flame monitoring mechanism.
Troubleshooting
Fault Possible cause Remedy of whom
Machine is not running; indi-
cator lamp for operations
stand-by (F) is not glowing There is no voltage in the machine. Check electrical mains. Electrician
Safety time switch is on. Switch off the appliance switch briefly and
switch it on again. Operator
Fuse in the control circuit (F3) has
burnt off. Fuse is located in the
control transformer (T2). Install a new fuse; if it burns out again, then
remove the cause for the over-loading. Customer Service
Pressure switch HP (High pres-
sure) or LP (Low pressure) is de-
fective. Check pressure switch. Customer Service
Timer module (A1) defective. Check connections, replace if required. Customer Service
+ Indicator lamp for engine
over-heating (G) is glowing Thermal sensor (WS) in the engine
or the over-current protection
switch (F1) has got activated. Rectify cause for over-loading. Customer Service
The water shortage safeguard in
the swimmer tank has got activat-
ed. Remove the water shortage. Operator
Burner does not ignite or the
flame glows off during opera-
tion Thermostat (B) has been set at a
very low temperature. Set the thermostat to a higher level. Operator
Machine switch is not positioned to
burner Switch on the burner. Operator
The water shortage safeguard in
the safety block has got switched
off. Ensure adequate water supply. Check ma-
chine for leaks. Operator
Close the gas valve. Open gas valve. Operator
The maximum temperature limiter
in the water outlet (> 110 °C) has
got triggered. Let the boiler cool down and restart the appli-
ance. Operator
Check thermostat. Customer Service
Indicator lamp for exhaust
gas thermostat (K) is glowing No gas supply. Open the gas supply. Operator
The incoming supply or exhaust air
outlet has got blocked. Check ventilation and exhaust system. Operator
Boiler floor is too hot. The maxi-
mum temperature limiter in the
boiler floor (> 80 °C) has got trig-
gered. No condensate water in the
boiler. Add 5 litre water via the measuring nozzle for
exhaust gas. Operator
Automatic gas firing system is
showing interruption. Press the unlocking key for the gas relay (I). Operator
No ignition. * Check electrodes distance between gas fir-
ing system and ignition cable. Rectify the dis-
tance or replace defective parts. Clean it, if
necessary. Customer Service
Blower or speed control plate is de-
fective. * Check blower and speed control plate. Re-
place plug and cables. Replace defective
parts. Customer Service
33 EN