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Code Description Solution
H01.09 Gas Pressure Switch Gas pressure too low:
No flow or insufficient flow:
Check that the gas valve is fully opened
Check the gas supply pressure
Wrong setting on the GPS gas pressure switch:
Check that the GPS switch has been fitted prop
erly
Replace the GPS switch if necessary
H01.13 Heat Exchanger temperature has exceeded the
maximum operating value
Maximum heat exchanger temperature exceeded:
Check the circulation (direction, pump, valves).
Check the water pressure.
Check that the sensors are operating correctly.
Check that the sensor has been fitted properly.
Check the cleanliness of the heat exchanger.
Check that the central heating system has been
correctly vented to remove air.
H01.14 Flow temperature has exceeded the maximum
operating value
Flow temperature sensor above normal range (high-
limit thermostat):
Bad connection: check the wiring and connectors
No flow or insufficient flow:
Check the circulation (direction, pump, valves)
Check the water pressure
Check the cleanliness of the heat exchanger
H01.15 Flue gas temperature has exceeded the maximum
operating value
Maximum flue gas temperature exceeded:
Check the flue gas outlet system
Check the heat exchanger to ensure that the flue
gas side is not clogged
Faulty sensor: replace the sensor
H02.00 Reset In Progress Reset procedure active:
No action
H02.02 Waiting For Configuration Number Configuration error or unknown configuration num
ber:
Reset CN1 and CN2
H02.03 Configuration Error Configuration error or unknown configuration num
ber:
Reset CN1 and CN2
H02.05 CSU does not match CU type Configuration error:
Reset CN1 and CN2
H02.09 Partial blocking of the device recognized Blocking input active or frost protection active:
External cause: remove external cause
Wrong parameter set: check the parameters
Bad connection: check the connection
H02.10 Full blocking of the device recognized Blocking input is active (without frost protection):
External cause: remove external cause
Wrong parameter set: check the parameters
Bad connection: check the connection
H02.12 Release Signal input of the Control Unit from device
external environment
Waiting time release signal has elapsed:
External cause: remove external cause
Wrong parameter set: check the parameters
Bad connection: check the connection
H02.36 Functional device has been disconnected Communication error with the SCB PCB:
Bad connection with BUS: check the wiring.
No PCB: reconnect PCB or retrieve from memory
using auto-detect.
11 Troubleshooting
76 7665063 - v.05 - 18102018
76


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