Gas Operation - Riello RLS 300/BP MX Installation, Use And Maintenance Instructions

8.2

Gas operation

SYMBOL FAULT
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
P
goes into lock-out
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 burner goes to lock-out
right after flame appearance
20036762
Faults - Probable causes - Solutions
PROBABLE CAUSE
No electrical power supply
A limiter or safety control device is open
Control box lock-out
Control box fuse blown
Erroneous electrical connections
Defective control box
No gas supply
Mains gas pressure insufficient
Minimum gas pressure switch fails to close
Air pressure switch in operating position
Contact (locking cam) of servomotor does not op-
erate
Flame simulation
Defective motor command control device
Defective electrical motor
Motor protection tripped
Contact of servomotor does not operate
Air pressure switch inoperative due to insufficient air pressure:
Air pressure switch adjusted badly
Pressure switch pressure point pipe blocked
Poorly adjusted head
Dirty fan
High negative draft in chamber
Fault in flame detection circuit
Contact servomotor does not operate
The solenoid VP1 allows little gas through
Solenoid valves VP1 or VP2 fail to open
Gas pressure too low
Ignition electrode wrongly adjusted
Grounded electrode due to broken insulation
High voltage cable defective or grounded
High voltage cable deformed by high temperature Replace and protect
Ignition transformer defective
Erroneous valves or transformer electrical con-
nections
Defective control box
A cock down-line of the gas train is closed
Air in pipework
The solenoid VP1 or VP2 allows little gas through
Dirty flame sensor
Defective connection
Insufficient defection current (min.70 µA)
Exhausted, defective flame sensor
Max. gas pressure switch operates
Defective control box
38 GB
SUGGESTED REMEDY
Close all switches and check con-
nections
Adjust or replace
Reset control box
Replace
(2)
Check
Replace
Open the manual valves between
meter and train
Contact your GAS COMPANY
Adjust or replace
Adjust or replace
Adjust locking cam or replace ser-
vomotor
Replace control box
Replace
Replace
Reset thermal cut-out
Adjust cam or replace servomotor
Adjust or replace
Clean
Adjust
Clean
Ask our technical office
Replace control box
Adjust cam or replace servomotor
Increase
Renew the coil or rectifier panel
Increase pressure at governor
Adjust
Replace
Replace
Replace
Repeat connection
Replace
Open
Bleed air
Increase
Check, replace flame sensor
Check, replace flame sensor
Measure current, replace flame
sensor
Replace
Adjust or replace
Replace