Roc Gas Boiler Error Codes Error E6 It means that there is a malfunction in the ignition device. Indicates a malfunction of the flame ionization sensor. This component takes into account the presence of a flame and blocks the operation of the Rok boiler during low combustion of the main burner or in cases of a failure in the gas supply. The termination of work occurs after three unsuccessful launches. To restore functions, you must press and hold the reset button.
Roc Boiler Error Code Solutions
Gas valve malfunction – The operation of the gas valve is controlled by an electronic board. This part is diagnosed by measuring voltage and resistance. If it is found that the values differ from the nominal parameters, the valve must be replaced with a working one. There is no gas inflow into the device – There is a valve in the gas distribution circuit that closes the gas supply. Therefore, a failure to start the unit may occur due to a closed tap. Weak contact or no signal from the flame control sensor. The electronic board is damaged – When the ignition process is normal, but the boiler immediately goes out, it can be assumed that the control board does not recognize the flame. In this case, you need to test it.
Roc Boiler Error Code E4
The heat exchanger of the Roc Optima is overheated. The device is blocked. The overheating protection thermostat has tripped – The overheating thermostat, like the temperature sensor, is in most cases installed on the outlet pipe of the main heat exchanger. The functional task of the thermostat is to protect the apparatus from high temperatures. The accident appears due to problems in the thermostat, temperature sensor, as well as a malfunction in the main circulation circuit.
Temperature sensor failure – The electronic board receives an incorrect signal or a contact failure between the control board and the sensor. Superheat thermostat failed – When it is serviceable, but an actual liquid superheat is detected, then, most likely, there was a problem with the circulation of the coolant of the main circuit. There is a blockage in the primary heat exchanger or the filter element of the main circuit (low circulation level gives increased heating of the liquid). The circulation pump is out of order or there is a blockage from the air in the heating system.
Roc Boiler Error Code EP
Speaks of low pressure inside the system. Possible reasons why this malfunction appears: low fluid pressure in the heating circuit. There is no contact between the minimum pressure sensor and the electronic board. Defective pressure switch. First of all, we recommend that you check the pressure gauge. Most often, a failure can be eliminated when using a make-up valve, which is mounted to supplement the system with a coolant. In the case when a repetition of the problem is observed, then most likely there is a coolant leak. The hydraulic pump, the main heat exchanger, the safety valve, worn seal elements, the feed valve and other components can leak. Leakage can be detected when inspecting hydraulic systems and components.
Roc Boiler Error Code E1
No traction. In order to ensure correct and trouble-free operation of the Roc boiler, it is necessary to provide draft to remove flue gases so that they do not enter the living quarters. The outlet of gases is controlled by automatics, and when some problems appear, the draft sensor will work, and the unit will be blocked. Possible reasons why there is no draft: small size of the chimney channel design flaw, pollution, ice on the walls. Reducing the size of the flue duct can cause a weakening of the draft. The maximum length of the chimney pipe has been exceeded.
It is recommended that you carefully study the installation manual for the gas boiler and check that the mandatory requirements are met. A very long horizontal outlet of the chimney leads to a weakening of the required draft. Draft sensor failure – If there is a vacuum in the inlet tube, a slight click will be noticeable. There is no contact between the control board and the pressure switch, there is condensate, as well as incorrect connection of the tubes to the pressure switch. Fan malfunction – The fan impeller is clogged. There is no lubrication on the fan shaft, so it does not increase the required speed. Lost contact between control board and fan.
Roc Boiler Error Code E3
The DHW temperature sensor is not functioning correctly. This code indicates that the DHW temperature sensor is defective or the recommended temperature is too high. Probable causes affecting the formation of this malfunction: the temperature sensor for hot water supply is damaged. The contact between the DHW temperature sensor and the electronic board is broken. Control board burned out. When the DHW temperature sensor is working and is firmly connected to the electronic board, but at this moment the boiler displays an error, then it seems that the control board has a defect.
Roc Boiler Error Code E7
Ignition problem. This circumstance occurs when there is no ignition or flame separation is observed. It is recommended to check the connections between the ignition unit and the flame electrode, and also between the gas valve and the board. The main factor in the separation of the flame of the burner may be weak draft.
Roc Boiler Error Code E2
The temperature sensor on the heating system does not work correctly. This indicates that the heating circuit temperature sensor has failed or the required temperature has risen. Damage to the heating circuit temperature sensor circuit – This problem can occur if the connection between the temperature sensor and the control board is interrupted, or the temperature is much lower than required. 5 seconds after the failure is detected, the Rok boiler will resume trouble-free operation if the failure occurred spontaneously.
You need to make sure that there is no moisture on the sensor connector and the electronic board connector. If there is no moisture, you need to replace the sensor. There is a short circuit in the temperature sensor in the heating circuit – This malfunction may occur due to a short circuit in the temperature sensor circuit or the temperature value of the water is above normal. First you need to measure the resistance of the sensor. If the resistance characteristics differ from the nominal ones, the sensor must be replaced. If the installation of a working sensor does not contribute to the result, repair the board.