Faults / Solutions - Riello FS5 Installation, Use And Maintenance Instructions

FAULTS / SOLUTIONS

Here below you can find some causes and the possible solutions for some problems that could cause a fail-
ure to start or a bad working of the burner. A fault usually makes the lock-out lamp light which is situated
inside the reset button of the control box (9, fig. 1, page 1).
When lock out lamp lights the burner will attempt to light only after pushing the reset button. After this if the
burner functions correctly, the lock-out can be attributed to a temporary fault.
If however the lock out continues the cause must be determined and the solution found.
BURNER STARTING DIFFICULTIES
Signal
2 blinks Once the pre-purg-
ing phase and safety
time have passed,
the burner goes into
lockout without the
appearance of the
flame
3 blinks The burner does not
switch on, and the
lockout appears
The burner switches
on, but then stops in
lockout
Lockout during pre-
purging phase
4 pulses The burner switches
on, but then stops in
lockout
Lockout when
burner stops
20025473
Problem
1 - The operation solenoid lets little gas .
through
2 - One of the two solenoid valves does
not open.
3 - Gas pressure too low . . . . . . . . . . . . Increase pressure at governor
4 - Ignition electrode incorrectly adjusted Adjust
5 - Electrode grounded due to broken . .
insulation
6 - High voltage cable defective . . . . . . . Replace
7 - High voltage cable deformed by high
temperature
8 - Ignition transformer defective . . . . . . Replace
9 - Incorrect valve or transformer . . . . .
electrical wiring
10 - Defective control box . . . . . . . . . . . . . Replace
11 - A closed valve upline the gas train . . Open
12 - Air in pipework . . . . . . . . . . . . . . . . . . Bleed air
13 - Gas valves unconnected or with . . .
interrupted coil
14 - Air pressure switch in operating posi-
tion
- Air pressure switch inoperative due to
insufficient air pressure:
15 - Air pressure switch incorrectly
adjusted.
16 - Pressure switch pressure test point .
pipe blocked
17 - Poorly adjusted head. . . . . . . . . . . . . Adjust
18 - High pressure in the furnace . . . . . . . Connect air pressure switch to
19 - Defective motor control contactor . . .
(only three-phase version)
20 - Defective electrical motor . . . . . . . . . Replace
21 - Motor lockout (defective electrical
motor)
22 - Flame simulation . . . . . . . . . . . . . . . . Replace the control box
23 - Permanent flame in the combustion .
head or flame simulation
Possible cause
12
Recommended remedy
Increase
Replace
Replace
Replace and protect
Check
Check connections or replace
coil
Adjust or replace
Adjust or replace
Clean
fan suction line
Replace
Replace
Eliminate persistence of flame
or replace control box