ECONCEPT SOLAR ST
28
EN
cod. -- - 11/2010 (Rev. 00)
List of faults DBM29 solar card
Low temperature zone card fault FZ4B
The controller indicates the boiler operating mode and its faults through the incorporated display: "St" means Standby
(no demand in progress), "CH" means that the zone controller requests the boiler for activation of heating mode, "DH"
means Domestic Hot Water production. The fault codes are given below:
The fault codes are also displayed in the corresponding menu of the Remote Control during normal operation.
F21
Incorrect system water pressure
The pressure is reaching the maximum
value
Check the system
Check the safety valve
Check the expansion tank
A26
System protection activation
Fault F40 generated 3 times in the last hour See fault F40
F34
Supply voltage under 170V
Electric mains trouble
Check the electrical system
F35
Faulty mains frequency
Electric mains trouble
Check the electrical system
F37
Incorrect system water pressure
Pressure too low
Fill the system
Sensor damaged
Check the sensor
F39
External probe fault
Probe damaged or wiring shorted
Check the wiring or replace the sensor
Probe disconnected after activating the
sliding temperature
Reconnect the external probe or disable the sliding
temperature
F40
Incorrect system water pressure Pressure too high
Check the system
Check the safety valve
Check the expansion tank
A41
Sensor positioning
Delivery sensor disconnected from the pipe Check correct positioning and operation of the heating sensor
F42
Heating sensor fault
Sensor damaged
Replace the sensor
F47
System water pressure sensor
fault
Wiring disconnected
Check the wiring
Fault
code
Possible cause
Cure
F82
Regulator configuration fault
Only with Parameter P26=1, Stand alone
F83
Solar Collector PT1000 sensor
The sensor fault, understood as a short circuit or open circuit, causes deactivation of the
Solar Pump and shutter closing. The protection is immediately deactivated on eliminating the
fault.
To signal this fault, the symbol S3 will be deactivated, whereas the Fault symbol and the
backlight will start flashing.
F84
Solar Collector Return NTC sensor
The sensor fault, understood as a short circuit or open circuit, causes deactivation of the
Solar Pump . The protection is immediately deactivated on eliminating the fault.
To signal this fault, the symbol S4 will be deactivated, whereas the Fault symbol and the
backlight will start flashing.
F85
Boiler card communication fault
Only with Parameter P26=0, Communicating
The fault, understood as no communication with the boiler card for 60 consecutive seconds,
causes deactivation of the Solar Pump and shutter closing. The protection is immediately
deactivated on eliminating the fault.
F87
Protection for no circulation
Only with Parameter P25<>0, Operation without flowmeter
This fault is activated when, with the Solar Pump activated, the card does not detect flow in
the solar circuit for 10 consecutive minutes. The fault causes deactivation of the Solar Pump.
After checking and eliminating the fault , the protection can be removed, activating and deac-
tivating the OFF mode.
Fault
code
Possible cause
Cure
F70
NTC sensor fault (T1)
With circuit / contact open
F71
NTC sensor fault (T2)
With circuit / contact open
F72
NTC sensor fault (T3)
With circuit / contact open
F73
NTC sensor fault (T4)
With circuit / contact open
F74
Communication with boiler card not present
F75
Communication with Remote Control (RT1) not present
(Only with Remote Control connected)
F76
Communication with Remote Control (RT2) not present
(Only with Remote Control connected)
F77
Communication with Remote Control (RT3) not present
(Only with Remote Control connected)
Fault
code
Fault
Possible cause
Cure
