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Code Display text Description Solution
H.02.00 Reset In Progress Reset In Progress Reset procedure active:
No action
H.02.02 Wait Config Number Waiting For Configuration Number Configuration error or unknown configuration
number:
Reset CN1 and CN2
H.02.03 Conf Error Configuration Error Configuration error or unknown configuration
number:
Reset CN1 and CN2
H.02.04 Parameter Error Parameter Error Factory settings incorrect:
Parameters are not correct:
Restart the boiler
Reset CN1 and CN2
Replace the CU-GH PCB
H.02.05 CSU CU mismatch CSU does not match CU type Configuration error:
Reset CN1 and CN2
H.02.09 Partial block Partial blocking of the device recog
nized
Blocking input active or frost protection active:
External cause: remove external cause
Wrong parameter set: check the parameters
Bad connection: check the connection
H.02.10 Full Block Full blocking of the device recog
nized
Blocking input is active (without frost protection):
External cause: remove external cause
Wrong parameter set: check the parameters
Bad connection: check the connection
H.02.12 Release Signal Release Signal input of the Control
Unit from device external environ
ment
Waiting time release signal has elapsed:
External cause: remove external cause
Wrong parameter set: check the parameters
Bad connection: check the connection
H.02.15 Ext CSU Timeout External CSU Timeout CSU time out:
Bad connection: check the wiring and connec
tors.
Faulty CSU: replace CSU.
H.02.18 OBD Error Object Dictionary Error Reset CN1 and CN2
See
The data plate for the CN1 and CN2
values.
H.02.36 Funct device lost Functional device has been discon
nected
Communication error with the SCB PCB:
Bad connection with BUS: check the wiring.
No PCB: reconnect PCB or retrieve from mem
ory using auto-detect.
H.02.48 Funct Gr Conf Fault Function Group Configuration Fault SCB not found:
Carry out an auto-detect
H.02.50 Funct Gr Comm Err Function Group Communication Er
ror
SCB not found:
Carry out an auto-detect.
H.02.62 Unsupported function Zone B doesn't support the selected
function
Zone B function setting is not correct or is not al
lowed on this circuit:
Check the setting of parameter CP021.
H.02.64 Unsupported function Zone D doesn't support the selected
function
Zone C function (DHW) setting is not correct or is
not allowed on this circuit:
Check the setting of parameter CP022.
H.02.80 Missing Cascade Ctrl Missing Cascade controller Cascade controller not found:
Reconnect the cascade master
Carry out an auto-detect
10 Troubleshooting
72 7734324 - v.06 - 01102021
72


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