Error Codes And Troubleshooting - Maktek OMEGA LCD Installation And Service Manual

5.3 ERROR CODES AND TROUBLESHOOTING

Error Code Explanation
CH Temperature
H1
Sensor Error
DHW
H2
Temperature
Sensor Error
CH Circuit Low
H3
Water Pressure
Error
Safety Thermostat
Error
H4
Boiler temp >=95°C
Limit Thermostat
H5
Error
Boiler temp >=93°C
Main Heat
H6
Exchanger Water
Level Error
CH Circuit High
H7
Water Pressure
Error
Ambient
H8 Temperature
Probe Error
 These solutions can only be performed by AUTHORIZED SERVICE PERSONNEL.
 These solution steps can be performed by end users.
Reason
• Disconnected sensor cable
• NTC sensor failure
• Mainboard failure
• Disconnected sensor cable
• NTC sensor failure
• Mainboard failure
• Aİr trapped in the system
• Water leakage from boiler
or installation
• Expansion tank failure
• Air trapped inside the system
• Valves on the installation
may be closed
• Thermostat failure
• Particule filters may be
clogged.
• Circulation pump failure
• Mainboard failure
• Air trapped inside the system
• Valves on the installation
may be closed
• Thermostat failure
• Particule filters may be
clogged.
• Circulation pump failure
• Mainboard failure
• Air trapped in main heat
exchanger
• Float water level sensor
failure
• Filling valve malfunction
• Expansion tank failure
• Plate heat exchanger
failure
• Return manifold failure
• Disconnected or
damaged probe cable
• Temperature probe
malfunction
40
Solution
 Check the cable and socket
 Replace the NTC sensor
 Replace the mainboard
 Check the cable and socket
 Replace the NTC sensor
 Replace the mainboard
 Vent the air from boiler and radiators then fill
system upto 1.5 bars.
 Check all piping and connections for leakage
 Check the counter pressure of the
expansion tank. Pressurize the tank upto
1.1 bars with nitrogen. If membrane is
damaged replace the tank.
 Vent the air from boiler and radiators then fill
system upto 1.5 bars.
 Make sure all the valves are open
 Check the thermostat connections, replace
thermostat if necessary.
 Clean the filters.
 Turn the rotor manually, check pump electric
connection, replace pump if needed.
 Replace the mainboard.
 Vent the air from boiler and radiators then fill
system upto 1.5 bars.
 Make sure all the valves are open
 Check the thermostat connections, replace
thermostat if necessary.
 Clean the filters.
 Turn the rotor manually, check pump electric
connection, replace pump if needed.
 Replace the mainboard.
 Vent the air inside the mani heat exchanger
using the manual air vent. Fill the system upto
1.5 bar.
 Check the cable of folat water level sensor
 Check if the folater is stuck, clean the part so
the floater moves freely. Replace the float
water level sensor if neccessary.
 Drain the excess water prom the drain valve
on the installation to reduce pressure.
 Check if the filling valve tightly closed.
 Replace the filling valve if its leaking.
 Check the counter pressure of the expansion
tank. Pressurize the tank upto 1.1 bars with
nitrogen. If membrane is damaged replace the
tank.
 Replace the palte heat exchanger.
 Replace the return manifold.
 Check the cable and connection.
 Replace the ambient temperature probe.