Arderia Gas Boiler Error Codes

Code error name possible reason

 

A1 short to air pressure sensor

Chimney blow-off 1. Clogging of the flue

2. Icing of the outlet

A2 low fan speed 1. Poor contact

2. Connection of wires is disrupted

3. Low speed fan (strangers hit)

A3 pump failure

The head pressure sensor was activated before the pump 1 was turned on. The sensor

A4 Overheating sensor triggered 1. All heating shut-off valves are closed

2. The filter of the heating circuit is clogged

3. The pump does not work.

4. The 3-way cock does not work

5. DHW flow sensor does not work

A5 Low pressure of coolant 1. Insufficient water in the heating system

2. Air in the heating system

3. The pump does not work.

4. Circulating pump works but insufficient frequency rotated damaged impeller

5. Pump head pressure malfunction

6. Leakage of water in the heating system

A6 Ignition error, no ignition, chimney blocking 1. Insufficient gas pressure

2. The gas valve does not work

3. Transformer does not work

4. Blocked gas flow

A7 Malfunction of the gas valve,

Closing of the gas valve relay Malfunction of the control unit

A8

Residual flame, non-sparking flame, in the chamber

There is a small flame - although the voltage on the gas valve does not flow

1. The problem with the diaphragm inside the gas valve

2. If the replacement of the gas valve does not help - replace the control unit

A9 Frosting lowering the water temperature in the boiler to 5 degrees

AA Boiling 1. All the heating circuits are closed

2. Clogging of the heating system filter

3. The pump does not work.

4. Damage in the 3-way crane

5. DHW flow sensor does not work

AB,

AC

Malfunction of the thermostat 1. Short circuit in the thermostat

2. Poor connection between thermostat and contacts 13 + 21

AE Chimney blocking 1. Foreign objects entering the flue

2. Deformation of the gas pipe