REMEHA Quinta Ace Installation, User And Service Manual page 66

12 Troubleshooting
Tab.38 Blocking codes
Code Text display
H00.36 Second return temperature sensor is either removed or
measure a temperature below range
H00.37 Second return temperature sensor is either shorted or
measure a temperature above range
H01.00 Communication Error occured
H01.06 Maximum difference between heat exchanger
temperature and flow temperature
H01.07 Maximum difference between heat exchanger
temperature and return temperature
H01.08 Delta T Max 3
H01.09 Gas Pressure Switch
66
Possible cause/check
Second return temperature sensor open:
Bad connection: check the wiring and connectors.
Incorrectly fitted sensor: check that the sensor has
been correctly fitted.
Faulty sensor: replace the sensor.
Second return temperature sensor short-circuited:
Bad connection: check the wiring and connectors.
Incorrectly fitted sensor: check that the sensor has
been correctly fitted.
Faulty sensor: replace the sensor.
Communication error with the CU-GH PCB:
Restart boiler
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 correctly ven­
ted to remove air.
Sensor error:
Check that the sensors are operating correctly.
Check that the sensor has been fitted properly.
Maximum difference between heat exchanger and re­
turn 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 correctly ven­
ted to remove air.
Sensor error:
Check that the sensors are operating correctly.
Check that the sensor has been fitted properly.
Maximum heat exchanger temperature increase has
been 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 correctly ven­
ted to remove air.
Sensor error:
Check that the sensors are operating correctly.
Check that the sensor has been fitted properly.
Gas pressure too low:
Gas pressure too low:
Check the gas supply pressure.
Check whether the gas tap is properly open.
Wiring fault: check the wiring.
Faulty gas valve: check the gas valve and replace it
if necessary.
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