Code
Display text
Description
Solution
E.00.05
TReturn Closed
Return temperature sensor is either
shorted or measures a temperature
above range
Return temperature sensor short-circuited:
Bad connection: check the wiring and connec
tors
Incorrectly fitted sensor: check that the sensor
has been correctly fitted
Faulty sensor: replace the sensor
E.00.08
THeat Ex Open
Heat exchanger temperature sensor
is either removed or measures a
temperature below range
Heat exchanger temperature sensor open:
Bad connection: check the wiring and connec
tors.
Incorrectly fitted sensor: check that the sensor
has been correctly fitted.
Faulty sensor: replace the sensor.
E.00.09
THeat Ex Closed
Heat exchanger temperature sensor
is either shorted or measures a tem
perature above range
Heat exchanger temperature sensor short-circuit
ed:
Bad connection: check the wiring and connec
tors.
Incorrectly fitted sensor: check that the sensor
has been correctly fitted.
Faulty sensor: replace the sensor.
E.00.20
TFlue Gas Open
Flue gas temperature sensor is ei
ther removed or measures a temper
ature below range
Open circuit in flue gas sensor:
Bad connection: check the wiring and connec
tors.
Incorrectly fitted sensor: check that the sensor
has been correctly fitted.
Faulty sensor: replace the sensor.
E.00.21
TFlue Gas Closed
Flue gas temperature sensor is ei
ther shorted or measures a tempera
ture above range
Flue gas sensor short-circuited:
Bad connection: check the wiring and connec
tors.
Incorrectly fitted sensor: check that the sensor
has been correctly fitted.
Faulty sensor: replace the sensor.
E.00.40
WaterPressureOpen
Water pressure sensor is either re
moved or measures a temperature
below range
Hydraulic pressure sensor open:
Bad connection: check the wiring and connec
tors.
Incorrectly fitted sensor: check that the sensor
has been correctly fitted.
Faulty sensor: replace the sensor.
E.00.41
WaterPressureClosed
Water pressure sensor is either
shorted or measures a temperature
above range
Hydraulic pressure sensor short-circuited:
Bad connection: check the wiring and connec
tors.
Incorrectly fitted sensor: check that the sensor
has been correctly fitted.
Faulty sensor: replace the sensor.
E.01.04
5x Flame Loss Error
5x Error of unintended Flame Loss
occurance
Flame loss occurs 5 times:
Vent the gas supply to remove air
Check that the gas valve is fully opened
Check the gas supply pressure
Check the operation and setting of the gas
valve unit
Check that the air supply inlet and flue gas out
let are not blocked
Check that there is no recirculation of flue
gases
10 Troubleshooting
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