Testing Definition
Testing Method
Gas Valve Resistance
Control
Cut off the power of the boiler. Measure the resistance between
connecting pins of gas valve. Check whether it is in the range of
110-120 Ohm.
Measuring Gas Valve
Supply Voltage
Cut off the power of the boiler. Dismount the gas valve connector.
Connect the power to the boiler. Check whether the resistance at
the connector ends coming from the main board is in the range of
23-25 V when the boiler is trying to ignite.
MAIN HEAT EXCHANGER
Subject
Description
Part Function
It is the main component in the central heating circuit enabling heat
transfer to water.
Impact in Case of Faulty
Operation
1- Failure to fully meet heating demand
2- Water or gas leakage
Primary Relevant Error
Codes
E01, E03, F07, F37
,F58
Troubleshooting and
Testing Method
1- Checking whether there is any dirt on pipes of exchanger wings
and clogging between pipes
2- Visual inspection of cracks or holes on exchanger pipes
3- Noises of boiling, bubbling, etc. coming from inside exchanger
4- Fresh air emission measurement testing
Maintenance Requirement
Exchanger inner pipe cleaning
Maintenance Period
Once a year, according to instructions below.
57
