ROC COMBI HE 2802 - Page 39

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Er 01 Fault:
When the display shows Er01 fault, it means
the flame cannot be detected. Check if the
gas elements and pressure; if there is any air
inside the gas pipe; if the gas valve, igniter,
ignition needle or the ame detecting needle is
damaged.
Er 02 Fault:
When the temperature of heat exchange
condensing system is anomalous, the Er
02 will occur. This error appears when the
temperature of water over 100
°C
, the overheat
protector will active. You should examine if
the heating pipe has been become blocked,
check all the valves in heating pipe are
opened, also to check if the discharging of
condensing water is normal.
Er 03 Fault:
Er03 fault occurs when the ame signal can
be detected after the gas valve is closed.
Generally caused by damp in ame detecting
needle or circuit board, please dry them.
Er 04 Fault:
The display indicated Er04 means there is not
enough water in the heating pipe. Check the
pressure gauge and add water if there is less
than 1.0 bar pressure (water pressure needs
to be between 1.0 and 1.2 bar), or test the
water pressure switch for damage.
Er 05 Fault:
Er 05 means there is a fault with the flue
system, it maybe cause by the fan, please
check the fan and the connecting wires to see
if they are loose or damaged.
Er 06 Fault:
Er 06 indicated that the temperature of
heating water is unusual, it could be caused
by extremely cold water, or damage of the
heating NTC temperature sensor. Check if the
water temperature less than -20
°C
. Else the
NTC temperature sensor maybe damaged.
Er 07 Fault:
Er 07 indicated that the temperature of DHW
water is unusual, it could be caused by
extremely cold water, or damage to the DHW
NTC temperature sensor. Check if the water
temperature less than -20
°C
. Else the NTC
temperature sensor maybe damaged.
Er 08 Fault:
Er08 indicated that the external temperature
sensor is out of order or disconnection.
Check the connection or replace the external
temperature sensor, or stop the function in
the ECS menu.
Er 09 Fault:
Er09 means the temperature sensor of the ue
system is out of order or disconnected, check
the connection wire or replace the sensor.
Er 10 Fault:
Er10 means the temperature of ue system
is too hot, check the ue system or clean the
heat exchanger.
Er 11 Fault:
Er11 ame can be detected before the boiler
is turned on, there maybe be a fault one the
circuit or ame detection
Er 12 Fault:
Er12 means return-back water temperature
sensor is anomalous. Check the connection
wires or replace the return-back water
temperature sensor.