Worcester GREENSTAR HEATSLAVE 12/18 Instruction Manual page 53

IGNITION
Y
SPARK
PRESENT?
N
ARE ELECTRODES
N
OK & SET
CORRECTLY?
Y
REPLACE /
RESET
ELECTRODES
N IGNITION
LEADS OK?
Y
REPLACE
IGNITION
LEADS
F
REPLACE
CONTROL BOX
PUMP PRIMING FEATURE
(see instruc on manual)
Sequence for pump priming ac va on
The func on can only be ac vated using the remote reset during lockout
l
Press and hold the remote reset bu on for more than 6s and then release
- If the bu on is not released, the control box remains in this posi on,
with the LED blinking, and the burner does not start
LED - GREEN / ORANGE / RED blinking
l
Press and hold the remote reset bu on for 3 seconds to ac vate the pump
priming func on
LED - GREEN / ORANGE / RED
The fan motor starts up a er 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 ini al lockout condi on
LED - RED
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE 12/18-18/25-25/32
6 720 802 432 issue A 04/2012
SOLENOID COIL
NOZZLE
Y
RELEASES
ATOMIZING THE
WORKING
FUEL?
PRESSURE?
N N
CONTAMINATED Y NOZZLE
FUEL FILTERS? NEW?
N Y
CLEAN /
REPLACE
FILTERS
E
CHECK OIL PIPE
Y
SOLENOID COIL
FROM PUMP TO
RESISTANCE
NOZZLE HOLDER
90 to 110Ω?
N
CLEAN / REPLACE
REPLACE
PUMP & FUEL
SOLENOID COIL
LINE FILTERS
AFTER 15s
N 25-30Vdc TO SOLENOID
COIL? (COIL
CONNECTED)
Y
REPLACE
OIL PUMP
FAULT FINDING LOGIC FOR
RIELLO DIGITAL CONTROL BOXES
C
COMBUSTION
Y
Y
AIR SET
CORRECTLY?
N
ADJUST
N
COMBUSTION
AIR SETTING
REPLACE
NOZZLE
CLEAR Y BOILER OR FLUE
BLOCKAGE
N
TEST - NOW OK?
BALANCED FLUE
PHOTOCELL
Y
CAN RECIRCULATE
RESISTANCE >10
GASES CAUSING
MΩ IN DARK AND
<10 kΩ IN LIGHT?
N
REPLACE
PHOTOCELL
LIGHT DIAGNOSIS FEATURE (FLAME STRENGTH INDICATOR)
(see instruc on manual)
Sequence for enable / disable
This can only be carried out during opera on (burner running)
l
Press and hold the reset bu on for 15-20 sec.
LED - GREEN blink 2 mes
l
Release the reset bu on
LED - GREEN OFF
l
Press the reset bu on 1 me for enable or 2 mes for disable
LED - GREEN blink ON then OFF with every correct press and release
A er 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
N
HEAD SET
CORRECTLY?
Y
RESET
COMBUSTION
HEAD
FLAME GOES
Y
OUT THEN
RE-LIGHTS?
N
BLOCKED?
N
IF BALANCED
FLUE; REMOVE
SNORKEL AND
Y
RECYCLING
CHECK FLUE
POSITION &
SEALS
ELECTRICAL SCHEMATIC
53