Robur Caldaria 100.2 Condensing+ export, Installation, Use And Maintenance Manual

Page: 52 / 56

Diagnostics
52
8
Code Fault Possible cause Remedial action Reset
E15 Return probe fault
Probe fault or out of calibration (nominal resist-
ance 10 KΩ at 25 °C)
Replace
Automatic
Probe connector wet or disconnected Check the electrical connection
E16 Blower fault
Blower board fault Replace
Automatic Broken blower Replace
Power supply cable fault Replace
E18 Low water flow
Clogged exchanger Clean the heat exchanger or replace it
Automatic
Circulator fault or dirty impeller Clean the impeller or replace the circulator
E21
Generic internal elec-
tronic board error Wrong recognition of a signal by the micropro-
cessor of the modulation board If the modulation board does not reset the error
automatically, replace it
Automatic
E22
Parameter program-
ming request
Microprocessor memory loss Reprogram parameters
Manual reset (disconnect
the power supply)
E31
Not compatible
remote control The remote controller connected to the boiler is
not compatible with the electronic board
Replace with a compatible one Automatic
E31 (4)
Solar board connection
error
Incorrect setting of parameter P34 to value 1 Set parameter P34 to 0 Automatic
E32
Communication error
between boiler board
and Modbus board No electrical connection Check the electrical connection
Automatic
Modbus board fault Replace
E35 Parasitic flame
Flame detector fault Clean or replace
Manual reset (press
key) (1)
Flame detector cable fault Replace
Modulation board fault Replace
E40
Wrong power supply
voltage
Supply voltage out of operating range (≤160 V) Check the power supply network Automatic
E52
Communication error
between the OT/
Modbus interface and
the ODSP039 cascade
controller No electrical connection Check the electrical connection
Automatic
Modbus board fault Replace
E78 Manifold probe fault
Probe fault or out of calibration (nominal resist-
ance 10 KΩ at 25 °C)
Replace
Automatic
Probe connector wet or disconnected Check the electrical connection
E99
Generic CRAD board
error
Incorrect setting of parameter P29 to value 1 Set parameter P29 to 0 Automatic
1 In the Caldaria 100.2 press the key on the master control panel.
2 Only for boilers with DHW production.
3 Not applicable to Caldaria 100.2.
4 Only for Caldaria 100.2.
Table 8.2 Signalling codes (visible ONLY on the boiler display)
Code Function Description
F07
Chimney sweep
function active
It is activated by pressing the reset key for 7 seconds and it is deactivated by turning off the boiler.
Brings the boiler to the minimum and maximum power for 15 minutes by deactivating the modulation function. Generally used
for combustion and calibration tests.
F08
Heating antifreeze
function
It is automatically activated when the heating probe detects a temperature of 12 °C. The boiler operates at minimum power and is
deactivated when a water temperature of 30 °C (on the outlet) or 20 °C (on the inlet) is detected.
F09 (1)
DHW antifreeze
function
It is automatically activated when the DHW probe detects a temperature of 4 °C. The boiler operates at minimum power with
diverter valve in summer position. It is deactivated when a temperature of 8 °C is detected.
F28 (1) Legionella function
It is activated for the first time one hour after the boiler has been turned on. After, the cycle is carried out every 7 days at the same
time, with the aim of raising the temperature of the DHW buffer tank above 60 °C.
F33
System air purge cycle
in progress
It automatically starts when the boiler is first turned on, running for 5 minutes a series of cycles in which the pump is turned on for a
period of 40 seconds and then turned off for a period of 20 seconds. Regular operation is only permitted at the end of the function.
It can also be activated during normal operation of the boiler, in the event that the enable of the water pressure switch is lacking,
when the contact is closed, a 2-minute venting cycle is performed.
FH (2) Fast H
2
O
It is activated or deactivated by holding down the reset and keys of the DHW circuit for 7 seconds.
1 Only for boilers with DHW production.
2 Only for boilers with instantaneous production of DHW.