Blocking - REMEHA Gas 210 Ace 80 Service Manual

Code Display text
A.02.49 Failed Init Node
A.02.55 Inval or miss SerNR
A.03.17 Safety check
8.1.3

Blocking

Tab.57 Blocking codes
Code Display text
H.00.16 DHW sensor Open
H.00.17 DHW sensor Closed
H.00.36 T 2nd Return Open
H.00.37 T 2nd Return Closed
H.01.00 Comm Error
H.01.06 Max Delta TH-TF
7837115 - v.01 - 10012023
Description
Failed Initialising Node
Invalid or missing device serial num­
ber
Periodically safety check ongoing
Description
Domestic Hot Water tank tempera­
ture sensor is either removed or
measures a temperature below
range
Domestic Hot Water tank tempera­
ture sensor is either shorted or
measures a temperature above
range
Second return temperature sensor is
either removed or measures a tem­
perature below range
Second return temperature sensor is
either shorted or measures a tem­
perature above range
Communication Error occured
Maximum difference between heat
exchanger temperature and flow
temperature
Solution
SCB not found:
Carry out an auto-detect
Contact your supplier.
Safety check procedure active:
No action
Solution
Domestic hot water temperature sensor open:
Sensor is not present
Incorrectly fitted sensor: check that the sensor
has been correctly fitted
Bad connection: check the wiring and connec­
tors
Faulty sensor: replace the sensor
Domestic hot water temperature sensor short-
circuited:
Incorrectly fitted sensor: check that the sensor
has been correctly fitted
Bad connection: check the wiring and connec­
tors
Faulty sensor: replace the sensor
Second return 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.
Second return 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.
Communication error with the security kernel:
Restart the boiler
Replace the CU-GH
Maximum difference between heat exchanger
and flow temperature exceeded:
No flow or insufficient flow:
Check the circulation (direction, pump,
valves).
Check the water pressure.
Check the cleanliness of the heat exchanger.
Check that the installation has been de-aired.
Check water quality according to supplier's
specifications.
Sensor error:
Check that the sensors are operating correct­
ly.
Check that the sensor has been fitted proper­
ly.
8 Troubleshooting
59