MORA TOP Gas Boiler Error Codes & Troubleshooting

Error E0 - The device is blocked. There is no gas supply. The burner is not active. The pump is switched off. The internal elements of the control and regulation unit are broken. Replacement is required.

Error E1 - The boiler is blocked. There is no shortage of switches. In this connection, no gas is supplied, the burner is not active, the pump is switched off. A small amount of water in the heating system. A clogged filter may be present. It is required to clean it. A small amount of water in the heating system. Pump failure. Replacement is required. Little water in the heating system. The pump, instead of the recommended 2nd or 3rd stage, is installed on the first one. Set the correct mode. Also, the error code E1 may occur in the following cases: Presence of air plugs. It is required to pump water in order to establish the recommended pressure in the system. Switching the heating mode and NTC, drain excess air. Reload the unit.

Problems with the axis of the duct switch, it is either slow-moving, or completely immobile. It is required to disassemble the switch box from the flow sensor housing. Try to release the jammed axis. If this does not work by turning the boiler on and off, push it with your finger. Too much clearance between the axle and the shoulder of the transmission and the switch. It is necessary to set the position correctly plastic shoulder transferring motion. The breaker is broken. Replacement is required. The electrical connection of Mora Top Gas Boiler  between the switch and the control and regulation unit is interrupted. A chain recovery is required. Check the wires.

Error E2 - The Mora boiler is stopped by an accident. The supply of gas is disrupted. After the flame is turned off, the device tries to start again. The pump does not turn off until the machine attempts to start work. Then he gets up. The flame went out, as there is no gas supply. Press the Reset button. Due to the fact that the burner is heavily soiled, the gas supply is difficult. In this case, partial burning of the flame can be observed. It is necessary to clean the gas supply port. The electrode is broken or the electrical connection is damaged. Make a replacement. The ignition transformer is broken or the electrical connections are damaged. Make a replacement. Absence or partial contact in the electrical connection ignition transformer and control and regulation unit. Check for a contact if it needs to be restored. The phase and zero in the network is confused. Connect the boiler correctly. The reverse draft fuse has triggered due to too high temperature rise due to leakage of combustion products. This is possible with complete or partial obstruction of the chimney. Clean the pipes of the bends and the chimney. To start, press the reset button. Also, the error code E2 may occur in the following cases: The reverse link fuse is broken. Replacement is required. The return line fuse linkage is damaged. Check the connection. Reestablish. No contact between the control unit return thrust guard. Restore the contact. The emergency thermostat has worked, as the temperature of the heating water has exceeded the maximum permitted value. Incorrect gas supply. Find out the reason. Eliminate. Breakdown of the emergency thermostat. Check its operation. At 95 degrees it must open. If necessary, install a new one. There is no contact of the emergency thermostat electrical connection. Check and fix. Poor or no contact between the emergency thermostat and the control and regulation unit. Check, replace if necessary. The ignition electrode is not installed correctly. Set correctly, considering that the distance between the end of the electrode and the plate is at the rate of 3-4 mm. The gas valve did not open. The result is that the flame is gone. For the diagnosis it is necessary to check the contact of the convector of the main gas valve in the control unit. If necessary, replace.

Error E3 - The heating water temperature sensor is open. The device does not turn on in both modes. The gas supply to the burner is broken, therefore the flame is not present, the pump is not switched on. The heating water temperature sensor is broken. Replacement is required. There is no contact at the sensor. Check the connection. Also, error code E3 may occur in the following cases: Problems with the connection circuit of the temperature sensor electrical connection. Check and fix. There is no contact between the temperature sensor and the control and regulation unit. You must restore the contact.

Error E4 - The water temperature sensor is not closed. The Mora gas boiler works in both modes. Instead of the sensor responsible for the temperature of the domestic water, the heating temperature sensor starts working. Accordingly, there are problems with adjusting the desired temperature in the DHW circuit. Also, the error code E4 may occur in the following cases: The DHW sensor is defective. Replacement is required. There is no contact with the temperature sensor. Check and repair. There is no contact in the electrical circuit of the temperature sensor. Check and repair. There is no contact between the temperature sensor and the control and regulation unit. You need to restore the contact.

Error E5 - Breakage in the security module. The unit is stopped by an accident. With this error, the burner is turned off, the flame is lost due to a gas supply failure. The pump runs continuously. The emergency thermostat is activated, as the temperature of the heating water exceeds the maximum permissible maximum value. At the same time, the gas supply is shut off. To eliminate, it is necessary to understand why the overheating occurred. Breakdown of the emergency thermostat. It is necessary to check its operation, at a temperature below 95 degrees it must be closed. If the failure is confirmed, replacement is required. Breakage of the emergency connection of the emergency thermostat. It is necessary to check and restore the work. There is no contact between the emergency thermostat and the control and regulation unit. It requires troubleshooting and recovery. There is no connection of the pressure switch. It is necessary to check the patency of the path for the removal of combustion products or the supply of clean air. Eliminate the problem. Also, the error code E5 can occur in the following cases: The pressure switch is broken. There is no connection with it when the fan is running. It is required to install a new switch. Problems in the electrical circuit of the pressure switch. Check and repair the circuit. There is no contact between the pressure switch and the control and regulation unit. Restore the contact. The tube, connecting the pressure switch and the fan, or disconnected, or was damaged. It is necessary to check, and put a new one, if required. Maybe the fan does not start its work. The engine does not work. The impeller bearing impeller has lost its mobility. The valve does not work because of any mechanical damage. This problem requires checking and replacing the fan. There is no contact for the electrical connection of the fan. There is no set speed of rotation of the fan blades. Check and fix. There is no contact between the fan and the control and regulation unit. To set up a contact.

The appliance can not dial the power required for operation - In this case, the water temperature in the NTC or for heating does not heat up to the set value.

The boiler Mora Top always gets into the minimum power mode during operation - Problems in the electrical connection of the modulator to the coils. Check the cable and the contact in the control and regulation unit. Breakage of the modulator on the coil. To eliminate this problem, a complete replacement of the gas valve is required. The unit is not configured, its minimum and maximum power is set with an error. It is necessary to regulate these parameters again.

The appliance does not work in NTC mode. - The burner does not turn on, there is no heating of the water. Poor supply of water for household needs. The hot water filter is dirty. It is required to clean it. The differential valve is heavily soiled. It is required to clean it. The water supply pressure is lower than required. To solve the problem, it is necessary to increase the water supply pressure. If there is enough water in the NTC, the three-way valve does not switch. Check the water flow between the differential valve and the three-way valve. If necessary, clean. There was a sticking of the 3-way valve. Try to solve the problem by turning the water supply on and off for NTC. When

failure of this procedure, install a new valve. It may damage the integrity of the membrane in the hydraulic part of the three-way valve. You need to install a new one. The water supply is carried out sufficiently, the three-way valve switches from mode to mode. Check the clearance between the axis of the 3-way valve, the transfer arm and the switch. Maybe it's too big. Adjustments are required. Breakage of the dhw switch. Replacement is required. A problem in the circuit is the electrical connection between the switch and the control and regulation unit. Restore the chain.

The wall of the Mora boiler has problems with NTC, the burner is running, there is no or insufficient heating of the water for household needs. - At a good supply pressure, the water in the faucets is not heated to a sufficient amount. The problem is in a heavily soiled secondary heat exchanger. It is necessary to clean it. When the boiler is operating, water leakage through the safety valve is observed.

The following problems are observed during the operation of the device. Once the heating water has reached the required temperature, the pressure increases to two and a half bars. After that, the safety valve is activated and a part of the water is discharged through it. In this case, when the water in the heating system cools, the pressure drops below the maximum allowable minimum value. Problems with the expansion tank. Perhaps a breach of its tightness. And you need to check the valve, and if it is damaged, install a new one. After this, the pressure set by the manufacturer of the value must be pumped. The membrane in the expansion tank is damaged. It is required to install a new expansion tank.

The pressure of water supply for household needs is so great that it raises the pressure in the heating system to two and a half bar. It is necessary to check the valve on the hydraulic unit to replenish the heating system, it may be open. When the device is operating in automatic mode, air plugs are not removed. The cap is too tight on the valve. Check this, if necessary, unscrew.