Fault - Probable Cause - Suggested Remedy - Riello RL 28/M Installation, Use And Maintenance Instructions

SYMBOL
FAULT
(1)
The burner does not start
The burner does not start and a
function lock-out occurs
The burner starts but stops at
maximum air damper setting
The burner starts and then goes
into lock-out
The burner remains in pre-purging
phase
After pre-purge and the safety
1
time, the burner goes to lock-out
and the flame does not appear
The flame ignites normally but the
burner locks out when the safety
time has elapsed
Firing with pulsations or flame
detachment, delayed firing
The burner does not pass to 2nd
stage
Uneven fuel supply
Internally rusted pump
Noisy pump, unstable pressure
Pump unprimes after prolonged
pause
Pump leaks light oil
Smoke in flame - dark Bacharach
- yellow Bacharach
Dirty combustion head
During operation, the burner stops
I
in lock out
(1) When the burner does not fire or comes to a halt following a fault, the symbol which appears on control box 23)(A)p.3 indicates the type of problem.
(2) The fuse is located in the rear part of the control box 23)(A)p.3. A pull-out fuse is also available as a spare part which can be fitted after breaking the tang on the
panel which holds it in place.
PROBABLE CAUSE
1 - A limit or safety control device is open . . . . . . . . . . . . . . . . Adjust or replace
2 - Control box lock-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset control box
3 - Oil pressure switch intervenes (see page 9). . . . . . . . . . . . Adjust pressure switch or eliminate overpres-
4 - Motor protection tripped (RL 38 - 50/M) . . . . . . . . . . . . . . . Reset thermal cut-out
5 - No electrical power supply . . . . . . . . . . . . . . . . . . . . . . . . . Close all switches - Check connections
6 - Control box fuse blown . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
7 - Contact II of servomotor does not operate,. . . . . . . . . . . . . Adjust cam II or replace servo-motor
control box terminals 11 - 8
8 - Pump is jammed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
9 - Defective capacitor (RL 28/M) . . . . . . . . . . . . . . . . . . . . . . Replace
10 - Defective motor command control device (RL 38 - 50/M). . Replace
11 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
12 - Defective electrical motor . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
13 - Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace control box
14 - Photocell short-circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace photocell
15 - Missing phase (RL 38 - 50/M). . . . . . . . . . . . . . . . . . . . . . . Reset thermal cut-out
thermal cut-out trips
16 - Contact I of servomotor does not operate, . . . . . . . . . . . . . Adjust cam I or replace servomotor
control box terminals 9-8
17 - Fault in flame detection circuit . . . . . . . . . . . . . . . . . . . . . . Replace control box
18 - Contact III of servomotor does not operate, . . . . . . . . . . . . Adjust cam III or replace servomotor
control box terminals 10-8
19 - No fuel in tank; water on tank bottom . . . . . . . . . . . . . . . . . Top up fuel level or suck up water
20 - Inappropriate head and air damper adjustments . . . . . . . . Adjust
21 - Light oil solenoid valves fail to open . . . . . . . . . . . . . . . . . . Check connections; replace coil
22 - Nozzle clogged, dirty, or deformed . . . . . . . . . . . . . . . . . . . Replace
23 - Dirty or poorly adjusted firing electrodes. . . . . . . . . . . . . . . Adjust or clean
24 - Grounded electrode due to broken insulation . . . . . . . . . . . Replace
25 - High voltage cable defective or grounded. . . . . . . . . . . . . . Replace
26 - High voltage cable deformed by high temperature . . . . . . . Replace and protect
27 - Ignition transformer defective . . . . . . . . . . . . . . . . . . . . . . . Replace
28 - Erroneous electrical connections of valves or transformer . Check
29 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
30 - Pump unprimed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Prime pump and see "Pump unprimes" (54-55)
31 - Pump/motor coupling broken . . . . . . . . . . . . . . . . . . . . . . . Replace
32 - Pump suction line connected to return line . . . . . . . . . . . . . Correct connection
33 - Valves up-line from pump closed . . . . . . . . . . . . . . . . . . . . Open
34 - Filters dirty: line - pump - nozzle . . . . . . . . . . . . . . . . . . . . . Clean
35 - Incorrect motor rotation direction . . . . . . . . . . . . . . . . . . . . Change motor electrical connections
36 - Defective photocell or control box . . . . . . . . . . . . . . . . . . . . Replace photocell or control box
37 - Dirty photocell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
38 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust
39 - Poorly adjusted or dirty firing electrodes . . . . . . . . . . . . . . . Adjust
40 - Poorly adjusted fan air gate: too much air . . . . . . . . . . . . . Adjust
41 - Nozzle unsuited for burner or boiler . . . . . . . . . . . . . . . . . . See Nozzle Table
42 - Defective nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
43 - Inappropriate pump pressure . . . . . . . . . . . . . . . . . . . . . . . Adjust
44 - Control device TR does not close . . . . . . . . . . . . . . . . . . . . Adjust or replace
45 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
46 - Check if cause is in pump or. . . . . . . . . . . . . . . . . . . . . . . . Feed burner from tank
fuel supply system
47 - Water in tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Suck water from tank bottom with separate pump
48 - Air has entered the suction line . . . . . . . . . . . . . . . . . . . . . Tighten connectors
- Depression value too high (higher than 35 cm Hg):
49 - Tank/burner height difference too great . . . . . . . . . . . . . . . Feed burner with loop circuit
50 - Piping diameter too small . . . . . . . . . . . . . . . . . . . . . . . . . . Increase
51 - Suction filters clogged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
52 - Suction valves closed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Open
53 - Paraffin solidified due to low temperature . . . . . . . . . . . . . . Add additive to light oil
54 - Return pipe not immersed in fuel . . . . . . . . . . . . . . . . . . . . Bring to same height as suction pipe
55 - Air enters suction piping . . . . . . . . . . . . . . . . . . . . . . . . . . . Tighten connectors
56 - Leakage from sealing organ . . . . . . . . . . . . . . . . . . . . . . . . Replace pump
57 - Not enough air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust head and fan gate
58 - Nozzle worn or dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
59 - Nozzle filter clogged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean or replace
60 - Erroneous pump pressure . . . . . . . . . . . . . . . . . . . . . . . . . Adjust
61 - Flame stability disk dirty, loose, or deformed . . . . . . . . . . . Clean, tighten in place, or replace
62 - Boiler room air vents insufficient . . . . . . . . . . . . . . . . . . . . . Increase
63 - Too much air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust head and fan gate
64 - Nozzle or filter dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
65 - Unsuitable nozzle delivery or angle . . . . . . . . . . . . . . . . . . See recommended nozzles
66 - Loose nozzle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tighten
67 - Impurities on flame stability disk . . . . . . . . . . . . . . . . . . . . . Clean
68 - Erroneous head adjustment or not enough air . . . . . . . . . . Adjust, open air damper
69 - Blast tube length unsuited to boiler . . . . . . . . . . . . . . . . . . . Contact boiler manufacturer
70 - Dirty or defective photocell . . . . . . . . . . . . . . . . . . . . . . . . . Clean or replace
14
SUGGESTED REMEDY
sure
(2)
when third phase is re-connected
located near burner