Faults - Probable Causes - Solutions - Riello RS 70 VA Installation, Use And Maintenance Instructions

FAULTS - PROBABLE CAUSES - SOLUTIONS

SYMBOL
FAULT
(1)
The burner does not start up
The burner does not start up
and the lockout appears
The burner starts up but locks out
at maximum output damper
opening
The burner starts up and then
P
locks out
The burner starts up and then
locks out
The burner remains in
pre-purging
After pre-purging and
1
safety time the burner
locks out without flame
Locks out with flame
The burner continues
repeating the cycle of
start-up without lockout
Lockout without symbol
indication
During operation, the burner
locks out
Lockout when burner stops
Ignition with pulsations
(1) The control box 14)(A)p.4 is fitted with a disc which rotates during the firing programme, which can be seen through the transparent lock-out reset button.
When the burner does not fire or comes to halt following a fault, the symbol which appears behind the reset button indicates the type of problem.
(2) The fuse is located in the rear part of the control box 14)(A)p.4.
A pull-out fuse is also available as a spare part which can be fitted after breaking the tag on the panel which holds it in place.
In the event of a burner lockout, more than two consecutive burner reset operations could cause damage to the installation. On the
third lockout, contact the Aftersales Service.
WARNING
If further lockouts or burner faults occur, interventions must only be made by qualified, authorised personnel (as indicated in this man-
ual, and in compliance with the laws and regulations currently in force).
DANGER
PROBABLE CAUSE
1 - No electrical power supply . . . . . . . . . . . . . . . . . . . Close all switches - Check connections
2 - A limiter or safety control device is open. . . . . . . . . Adjust or replace
3 - Control box lockout . . . . . . . . . . . . . . . . . . . . . . . . . Unlock control box
4 - Control box fuse interrupted . . . . . . . . . . . . . . . . . . Replace it
5 - Erroneous electrical wiring . . . . . . . . . . . . . . . . . . . Check connections
6 - Control box defective . . . . . . . . . . . . . . . . . . . . . . . Replace
7 - No gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Open the manual valves between meter and train
8 - Mains gas pressure insufficient . . . . . . . . . . . . . . . . Contact your GAS COMPANY
9 - Minimum gas pressure switch fails to close . . . . . . Adjust or replace
10 - Air pressure switch in operating position. . . . . . . . . Adjust or replace
11 - The Blue Cam contact of the servomotor, . . . . . . . Adjust Blue Cam or replace servomotor
terminals 11-8 of the control box does not intervene
12 - Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace control box
13 - Defective capacitor . . . . . . . . . . . . . . . . . . . . . . . . . Replace
14 - Faulty motor remote control switch . . . . . . . . . . . . . Replace
15 - Defective electrical motor . . . . . . . . . . . . . . . . . . . . Replace
16 - Motor lockout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unlock thermal relay when the three phases return
17 - The Red Cam contact of the servomotor, . . . . . . . . Adjust Red Cam or replace servomotor
terminals 9-8 of the control box does not intervene
Air pressure switch inoperative due to insufficient air pressure:
18 - Air pressure switch adjusted badly . . . . . . . . . . . . . Adjust or replace
19 - Pressure switch pressure test point pipe blocked . . Clean
20 - Defective flame detection circuit . . . . . . . . . . . . . . . Replace control box
21 - The Orange Cam contact of the servomotor, . . . . . Adjust Orange Cam or replace servomotor
terminals 10-8 of the control box does not intervene
22 - Solenoids VP1-VP2 do not let too much gas in . . . Increase pressure
23 - Gas pressure too low . . . . . . . . . . . . . . . . . . . . . . . Increase pressure at regulator
24 - Ignition electrode incorrectly adjusted. . . . . . . . . . . Adjust
25 - Electrode earthed due to broken insulation. . . . . . . Replace
26 - Faulty or earthed high voltage cable . . . . . . . . . . . Replace
27 - High voltage cable deformed by high temperature . Replace and protect
28 - Ignition transformer defective . . . . . . . . . . . . . . . . . Replace
29 - Valves electrical wiring or ignition . . . . . . . . . . . . . . Redo
transformer incorrect
30 - Control box defective . . . . . . . . . . . . . . . . . . . . . . . Replace
31 - A valve downline of the gas train is closed . . . . . . . Open
32 - Air in pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bleed air
33 - Solenoids VP1-VP2 do not let too much gas in . . . Increase
34 - Ionisation probe incorrectly adjusted. . . . . . . . . . . . Adjust
35 - Irregular probe electrical wiring . . . . . . . . . . . . . . . . Redo
36 - Insufficient ionisation (less than 4 µA). . . . . . . . . . . Check probe position
37 - Probe earthed . . . . . . . . . . . . . . . . . . . . . . . . . . . . Withdraw or replace cable
38 - Maximum gas pressure switch intervention . . . . . . Adjust or replace
39 - Control box defective . . . . . . . . . . . . . . . . . . . . . . . Replace
40 - The network gas pressure is close to the value .
on which the minimum gas pressure switch is
adjusted. The sudden drop in pressure after
valve opening causes temporary opening of the
pressure switch itself, the valve immediately
closes and the burner comes to a halt.
Pressure increases again, the pressure switch
closes again and the starting cycle is
repeated.
And so on.
41 - Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace control box
42 - Probe or ionisation cable earthed . . . . . . . . . . . . . Replace worn parts
43 - Fault on air pressure switch . . . . . . . . . . . . . . . . . . Replace
44 - Maximum gas pressure switch intervention . . . . . . Adjust or replace
45 - Flame persistence or flame simulation . . . . . . . . . . Eliminate flame persistence
in combustion head . . . . . . . . . . . . . . . . . . . . . . . . . or replace control box
46 - Head wrongly adjusted . . . . . . . . . . . . . . . . . . . . . . Adjust
47 - Ignition electrode incorrectly adjusted. . . . . . . . . . . Adjust
48 - Poorly adjusted fan air gate: too much air. . . . . . . . Adjust
49 - Output during ignition phase is too high . . . . . . . . . Reduce
23
SUGGESTED REMEDY
(2)
Reduce the minimum gas pressure switch intervention
pressure.
Replace the gas filter cartridge.