ECOFEL BOILER SERVICE MANUAL
3.1 Failure Solution Techniques:
⇒
Flame Cut off
Ignition or gas supply error. In this case
red led lights steadily.
Solution:
Check whether the gas valve is open, “RESET” to restart the boiler and perform ignition. Gas pressure is
checked through gas valve inlet control nozzle. If the gas pressure is below 2 mbar, user is informed that the gas
pressure is low. If it is normal, gas valve safety valve supply voltage output is checked from P9 ends no. 3-4 on the
main card. If there is no output, the main card is replaced. If there is output, resistance of the gas valve safety coils
are checked. If 800Ω resistance is seen, replace the connecting cable. If not, replace the gas valve.
⇒
Overheating
It is understood that the water temperature in the heater system exceeds 102-103ºC. In this case
and
leds light steadily.
Solution:
When the temperature falls to 70ºC, press “RESET” button to restart the boiler. Boiler piping, valves,
connectors, etc. are checked. If there is a problem, it is repaired. If there is no problem, according to the situation
after the appliance is reset two different sequencing checks described below are performed.
If the interference of limit thermostat has disappeared and the boiler has restarted, by adjusting the heater mode
temperature to minimum, going off of the burner is checked first in modulation and then when the required temperature
is reached. When the required temperature is reached if the burner goes off, the customer should be explained that
this failure is due to valves, filters, radiator valves in the system at high temperature demand (about 80ºC). If the
burner does not go off when the required temperature is reached, primary circuit (heater) heat sensor is checked. If
in the measurements 10ºC = 15 kΩ, 20ºC = 12 Ω, 40ºC = 5.7 kΩ, 60ºC = 3 kΩ values are not obtained, NTC heat
sensor is replaced. If these temperature values are not obtained, NTC heat sensor is checked fro the Main card P2
ends no. 3-4. If the same values cannot be read, connection cable is replaced or repaired. If it can be read, main
card is replaced.
If there is still limit thermostat interference, temperature of the environment in which limit thermostat exists is checked.
If the temperature is below 75ºC, limit thermostat contacts are measured. In case 0Ω (closed circuit) is not obtained,
limit thermostat is changed. If 0Ω (closed circuit) is obtained, ohmage check is performed by multimeter at Main
card P3 ends no. 2-6. If 0Ω (closed circuit) is not obtained connection cable, if 0Ω (closed circuit) is obtained main
card is replaced.
⇒
Burnt Gas Exhaust Failure
Flue kit system may be clogged or counter wind may be blowing. In this case
and
leds light steadily.
Solution:
Shut down the boiler, check if the flue kit pipes are clogged, if they are please remove the clogging objects
and restart the boiler. If the fan motor has no rotational movement and the pressure switch cannot change position,
the voltage coming to the fan motor is measured. If the measured voltage is below 186 volts, supply voltage
coming to the boiler is checked. If the same value is obtained in supply voltage, the customer is informed that the
voltage is low. In case the voltage coming to the motor coil is above 190 volts, the venturi located in the fan exhaust
section and high pressure measurement pipes are checked against clogging, getting dirty and thawing. If there is any
problem, it is cleaned or replaced. If there is no problem, mechanical strength of the fan propeller is checked. If there
is any problem, it is repaired/replaced. If there is no problem, pressure switch hoses are checked. In case of clogging
(water), thawing due to exterior factors, blowing out the hoses are replaced, otherwise pressure switch, diaphragm
and contacts are checked. In case 0Ω (closed circuit) is not seen, pressure switch is replaced. If 0Ω (closed circuit)
is seen, check is performed at Main card P3 ends no. 2-5. If 0Ω (closed circuit) is not seen connection cable is
replaced /repaired. If 0Ω (closed circuit) is seen main card is replaced.
- 26 -
Revision Date: 29 February 2008, Rev. No: 0