53
ELECTRICAL SCHEMATIC
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE 12/18-18/25-25/32
6 720 802 432 issue A 04/2012
FA
U
LT
F
IN
D
IN
G
& DIA
G
RAM
S
FAULT FINDING LOGIC FOR
RIELLO DIGITAL CONTROL BOXES
SOLENOID COIL
RESISTANCE
90 to 110Ω?
REPLACE
OIL PUMP
AFTER 15s
25-30Vdc TO SOLENOID
COIL? (COIL
CONNECTED)
CLEAN
/
REPLACE
PUMP & FUEL
LINE FILTERS
IF BALANCED
FLUE; REMOVE
SNORKEL AND
TEST - NOW OK?
NOZZLE
ATOMIZING THE
FUEL?
BOILER OR FLUE
BLOCKED?
ARE ELECTRODES
OK & SET
CORRECTLY?
SOLENOID COIL
RELEASES
WORKING
PRESSURE?
NOZZLE
NEW?
CHECK OIL PIPE
FROM PUMP TO
NOZZLE HOLDER
IGNITION
SPARK
PRESENT?
AIR SET
CORRECTLY?
CONTAMINATED
FUEL FILTERS?
IGNITION
LEADS OK?
FLAME GOES
OUT THEN
RE-LIGHTS?
COMBUSTION
HEAD SET
CORRECTLY?
Y
N
RESET
COMBUSTION
HEAD
ADJUST
COMBUSTION
AIR SETTING
REPLACE
SOLENOID COIL
REPLACE /
RESET
ELECTRODES
CLEAN /
REPLACE
FILTERS
CLEAR
BLOCKAGE
REPLACE
CONTROL BOX
REPLACE
IGNITION
LEADS
REPLACE
PHOTOCELL
CHECK FLUE
POSITION &
SEALS
BALANCED FLUE
CAN RECIRCULATE
GASES CAUSING
RECYCLING
PHOTOCELL
RESISTANCE >10
MΩ IN DARK AND
<10 kΩ IN LIGHT?
N
Y
N
N
Y
Y
N
Y
N
Y
Y
Y
Y
N
N
N
Y
Y
Y
N
N
Y
N
Y
Y
REPLACE
NOZZLE
N
N
N
C
E
F
PUMP PRIMING FEATURE
(see instrucon manual)
Sequence for pump priming acvaon
The funcon can only be acvated using the remote reset during lockout
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Press and hold the remote reset buon for more than 6s and then release
- If the buon is not released, the control box remains in this posion,
with the LED blinking, and the burner does not start
LED - GREEN / ORANGE / RED blinking
Press and hold the remote reset buon for 3 seconds to acvate the pump
priming funcon
LED - GREEN / ORANGE / RED
The fan motor starts up aer 2 seconds, and operates for 30 seconds
LED - GREEN / ORANGE / RED
At the end of the pump priming procedure, the control box returns to
the inial lockout condion
LED - RED
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LIGHT DIAGNOSIS FEATURE (FLAME STRENGTH INDICATOR)
(see instrucon manual)
Sequence for enable / disable
This can only be carried out during operaon (burner running)
Press and hold the reset buon for 15-20 sec.
LED - GREEN blink 2 mes
Release the reset buon
LED - GREEN OFF
Press the reset buon 1 me for enable or 2 mes for disable
LED - GREEN blink ON then OFF with every correct press and release
Aer 10 sec GREEN led blinking for mes programmed (0.5s ON / 0.5s OFF)
LIGHT DIAGNOSIS - GREEN flashes
acceptable - 1 to 2
good - 3 to 4
very good - 5 to steady on
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