Worcester Greenstar CDi Compact Installation, Commissioning And Servicing Instructions page 66

FAULT FINDING AND DIAGNOSIS
Note that it could be up to 10 seconds after the button is
Test pressed before the selected component responds.
t1 Igniter test.
Checking the igniter
spark.
t2 Fan test.
Checking the basic fan
operation.
t3 Pump test.
Checking the basic pump
operation.
t4 Three way valve test.
Test the operation of the
diverter valve.
t6 Ionisation oscillator test.
Tests the flame detection
circuit.
Table 20 Test menu
66
The igniter will spark for a maximum
of 30 seconds. The spark will be
audible if the igniter is OK.
The fan will run for a maximum of 30
seconds. If the fan is OK then the fan
will be heard running.
The pump will run for a maximum of
45 seconds. If the pump is OK then
the pump will be heard running.
When 1 is selected via the test menu
the diverter valve will move to the
DHW position. When 0 is selected
the valve will move to CH position.
Ionisation circuit is switched on. An
A.C. voltage of approximately 150
Volts can be measured between the
ionisation probe and earth.
6 720 803 800 (2012/11)