DeDietrich EMC-M 30/35 MI Service Manual download pdf (Page 65)

Lock out (Status signals)

Status signals Description Probable causes Checking / solution

Error code 1

(1 times red

signal)

Sensor fault,

temperature fault or

flow fault

4 Sensor not or badly

connected

4 Bad connection

4 Non-existent or insufficient

circulation

4 Water circulation direction

reversed

4 Sensor fault

4 Check the wiring

4 Check that the sensors are operating correctly

4 Check that the sensor has been correctly fitted

4 Vent the air in the heating system

4 Check the water pressure

4 Check the cleanliness of the heat exchanger

4 Check the circulation (direction, pump, valves)

4 Replace the sensor if necessary

Error code 2

(2 times red

signal)

Maximum

temperature of heat

exchanger or control

unit exceeded

4 Non-existent or insufficient

circulation

4 Sensor not or badly

connected

4 Bad connection

4 Sensor fault

4 No air supply or insufficient

air supply

4 No flue gas flow or

insufficient flue gas flow

4 Circulation

4 Vent the air in the heating system

4 Check the water pressure

4 Check the cleanliness of the heat exchanger

4 Check the circulation (direction, pump, valves)

4 Check the wiring

4 Check that the sensors are operating correctly

4 Check that the sensor has been correctly fitted

4 Replace the sensor if necessary

4 Check air supply

4 Check flue gas flow

4 Replace seals

Error code 3

(3 times red

signal)

Ignition fault:

4 5 burner start-up

failures

4 False flame

signal

4 5x Flame loss

4 No ignition

4 Ignition arc, but no flame

formation

4 Presence of the flame but

insufficient ionization (<1

µA)

4 Check the wiring

4 Check breakdown to earth

4 Check the condition of the burner set

4 Check the earthing

4 Check that the gas valve is fully opened

4 Check the supply pressure

4 Purge the gas supply to remove air

4 Check the operation and setting of the gas valve

unit

4 Check that the air inlet and flue gas discharge

flues are not blocked

4 Replace the ionization/ignition electrode

Error code 4

(4 times red

signal)

Fan fault

4 External draught over the

boiler

4 Defective gas/air unit

4 Check for adequate draw on the chimney

connection

4 Replace the gas/air unit

Error code 5

(5 times red

signal)

Parameter error

4 Bad connection

4 Safety parameters not found

4 Check the wiring

4 Reset dF/dU code with a service tool

Error code 6

(6 times red

signal)

Miscellaneous

4 Several possible causes 4 Fault codes can be read using a service tool

EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI 8. Troubleshooting

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DeDietrich EMC-M 30/35 MI Service Manual Page 65

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