Locking - DeDietrich AMC Pro 45 Service Manual

10 Troubleshooting
Code Display text
H10.38 T Dhw Zone AUX open
H10.39 Sens. ZoneAUX Closed Domestic Hot Water temperature
Tab.100 Locking codes
Code Display text
E00.04 TReturn Open
E00.05 TReturn Closed
E00.06 TReturn Missing
E00.07 dTReturn Too High
108 AMC Pro
Description
Domestic Hot Water temperature
sensor Zone AUX open
sensor Zone AUX closed
10.1.4

Locking

Description
Return temperature sensor is either
removed or measures a temperature
below range
Return temperature sensor is either
shorted or measures a temperature
above range
Return temperature sensor was
expected but not detected
Return temperature difference is too
large
Solution
Domestic hot water temperature sensor zone
AUX open:
Bad connection: check the wiring and connec­
tors
Incorrectly fitted sensor: check that the sensor
has been correctly fitted
Sensor is not present.
Faulty sensor: replace the sensor
Domestic hot water temperature sensor zone
AUX 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
When using thermostat instead of sensor: pa­
rameter CP504 must be set to off (=disable)
Solution
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
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
No connection to temperature return sensor:
Bad connection: check the wiring and connec­
tors.
Faulty sensor: replace the sensor
Difference between the flow and return tempera­
tures too great:
No circulation:
Vent the central heating system to remove
air
Check the water pressure
If present: check the boiler type parameter
setting
Check the circulation (direction, pump,
valves)
Check that the heating pump is operating
correctly
Check the cleanliness of the heat exchanger
Sensor not connected or incorrectly connected:
Check that the sensors are operating correct­
ly
Check that the sensor has been fitted proper­
ly
Faulty sensor: replace the sensor if necessary
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