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IT2656
Technical Sales
Documentation Department
TI
Technical information
Heading No 1
Fuel oil fired boilers
EFU 22 / 29 (FF) - EFU C 19 / 24 / 32
EFU C 24 /32 PLUS
Diagnostic aid - Fault finding
Product evolution
P5253 JS F 67580 Mertzwiller
N° IT2656
-en
27/01/2017
EN
1. Blocking of the safety control box
After 5 safety shutdowns, the safety box remains blocked at fault.
To unlock the safety box: turn off the burner power supply with the ON/
OFF button or by pulling out the burner plug.
After switching on again, reset the safety box by pressing the reset button.
The fault counting of the safety box is reset to 0, after each safety
box switching off (switching off by
ON/OFF
button, by unplugging
the burner or by power failure).
Troubleshooting help
- Signification of the safety control box reset
button flashing:
L000836-A
Normal operating
Reset button colour
Seconds
Colour code
OFF
OFF
-
-
-
Pre-heating time
GREEN blinking
0,5
2,5
Pre-ventilation
ORANGE blinking
0,5
0,5
Safety time
GREEN blinking
0,5
0,5
Normal operating
GREEN
*
-
-
Blinking
or steady ON
Fault description
Reset button colour
Seconds
Colour code
Extraneous light (false flame signal)
GREEN
, RED
blinking
alternately
0,5
0,5
Frequency supply error
OR
A
NGE
-
-
Steady ON
Voltage monitor error
OR
A
NGE,
GREEN
fast
blinking alternately
0,2
0,2
Reset button fault
GREEN
, RED fast
blinking
alternately
0,2
0,2
Lockout due to no flame after ts
RED
-
-
Steady ON
Lockout for false flame signal
RED
blinking
0,5
0,5
Lockout for maximum number of recycles
RED
fast blinking
0,2
0,2
Lockout for pre-heating not finished
RED blinking
0,5
2,5
Lockout for fan motor error
RED, OR
A
NGE
inverted blinking
2,5
0,5
Lockout for oil valve error RED
RED, GREEN
inverted blinking
2,5
0,5
Lockout for eeprom error
OR
A
NGE, GREEN
blinking alternately
0,5
0,5
Key :
ON
OFF
Colour code
RED
ORANGE
GREEN
* Blinking depending on the flame signal quality : correct (1-2 blinks),
good (3-4 blinks) or excellent (5 blinks or always ON).
