Fault finding and diagnosis
Greenstar Danesmoor Utility
2022+
and Utility System
2022+
- 6 721 846 263 (2022/01) 57
8.5 Riello control box 12/18 model
8.5.1 Last lockout memory feature
The control box allows the last lockout that happened to be displayed.
Access to this function is possible in both STANDBY and OPERATING
status.
▶ Keep the button pressed for 25 seconds = t < 30 seconds
▶ Release the button.
LED displaying the type of lockout memorised for 10 seconds
The time displaying the type of lockout can be extended by pressing the
reset button again during the display of the lockout (the lock out display
continues for another 10 seconds)
8.5.2 Control box LED codes
8.5.3 Fault finding
Lockout types (burner in lockout)
Refer to Fault finding chart, section 8.5.3, go to line number on chart
RED steady ON
Lockout for no flame after safety time
[3]
RED 0.5 seconds ON/ RED 0.5 seconds OFF
Lock out for false flame signal
[5a]
RED 0.2 seconds ON /RED 0.2 seconds OFF
Lock out for maximum number of flame loss re-lights
[9]
RED 2.5 seconds ON / ORANGE 0.5 seconds ON
Lock out for fan motor failure
[3d]
RED 2.5 seconds ON / GREEN 0.5 seconds ON
Lock out for oil valve circuit driver failure
[8c]
ORANGE 0.5 seconds ON / GREEN 0.5 seconds ON
Lock out for EEPROM failure
Replace
control
box
Red 0.5s ON / Red 2.5s OFF
Max pre-heat time exceeded (10 minutes)
[2]
Table 11
Anomaly types (Burner in stand-by)
Green 0.5 s ON /
Green 2.5 s OFF
Pre-heating time
Fit pre-heat link
Green 0.5s ON /
RED 0.5s ON
Extraneous light
Lock out after 25s
Orange steady ON
Abnormal frequency
supply
When an anomaly appears during:
▶ pre-purge. the burner remains in pre-
purge.
▶ after ignition, burner remains in
operation.
When anomalies disappear the burner re-
starts
Orange 0.2s ON /
Green 0.2s ON
Control box internal
error
Green 0.2s ON /
Red 0.2s ON
Reset pushbutton or
remote reset failure
Remote reset / pushbutton is activated for
more than 60 seconds.
When anomaly appears the burner does
not stop
Table 12
Line Check Action
1 Control box is supplied with heat demand? Yes Go to line 2
No
Check boiler and system controls
2 Is the pre-heater fitted or if no pre-heater is fitted, is the link fitted? Yes
Go to line 3
No
Fit the Pre-Heater or link
3 Motor starts after initialization check time 3.5 seconds? Yes Go to line 4
No
Go to line 3a
3a Green 0.5 seconds ON/Red 0.5 seconds ON before lockout? Yes Go to line 5a
No Go to line 3b
3b Fan motor or oil pump seized? Yes Replace seized component
No Go to line 3c
3c 230 Volts to motor across blue and black motor wires? Yes Go to line 3d
No Replace control box
3d Approximately 35 across blue and black motor wires? Yes Replace motor capacitor
No Replace fan motor and check control box
4 Motor runs for less than 12 seconds? Yes Go to line 4a
No Go to line 5
4a
Motor gives 50 Volts a.c. across black and white wires? Yes Replace control box
No
Replace fan motor
Table 13
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