3061916_0611
19
Troubleshooting
The standard display will return when the fault has been removed.
The following fault messages can occur at the solar module:
Fault codes
If faults occur at the SM solar module, the corresponding fault
code and a warning symbol will flash on the display.
Example:
flashing
Fault
code
Fault
Cause
Remedy
FC62 Function check, flow rate (no flow) Too little or no
throughput
Check solar circuit pump
FC63 Function check, gravity brake
Faulty gravity brake
Check gravity brake
FC 64
applies
only to
P08 = 1
Pulse generator faulty
Pulse generator or cable
faulty
Check pulse generator
and cable; replace if
required
FC71
SM1:
Terminal SFS, solar sensor Faulty sensor or lead
Check sensor and lead;
replace if required
Cylinder faulty
SM2:
Terminal SFS1
Solar sensor
Cylinder 1 faulty
FC72
SM1:
Terminal RLF, return sensor
faulty
Faulty sensor or lead
Check sensor and lead;
replace if required
SM2:
Terminal E1, sensor on
input E1 faulty
FC73
SM1:
N/A
Faulty sensor or lead
Check sensor and lead;
replace if required
SM2:
Terminal E3, sensor on
input E3 faulty
FC74 DCF signal or reception
interference
No BUS connection; no
DCF reception
Check eBUS
connection/DCF
reception
FC79
SM1:
Terminal SFK, solar sensor Faulty sensor or lead
Check sensor and lead;
replace if required
Collector faulty
SM2:
Terminal SFK1, solar
sensor
Collector array 1 faulty
FC81 EEPROM fault
Parameter values
outside valid range
Reset to standard
values by briefly
interrupting the power
supply, and check
values
Note:
Fault codes 71, 72, 79, 73, 64, 62 and 74 are reset automatically as soon as their cause has
been removed. Fault codes 63 and 81 must be reset (acknowledged) explicitly by restarting the
SM. Alternatively, FC63 can be reset via the BM-Solar (by holding down the rotary selector for at
least 5 seconds).
