Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Disconnect fan electrical connector from the fan
assembly, position in a safe place
assembly, position in a safe place
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Reset appliance (press and hold reset button for 5 seconds, then release).
Ensure no demand, Set to ECO mode, ECO button illuminated which turns off the pre-heat function.
Test 1:
Measure for AC Voltage across terminals 2 (Brown) and 4 (Yellow) of connector ST5 and
note the reading.
Test 2:
Turn Hot Water Tap On
Measure for AC Voltage across terminals 2 (Brown) and 4 (Yellow) of connector ST5 again.
Expect an increase in voltage of approximately 1.3 VAC or greater from the original voltage
measured on the first test.
NOTE: If appliance lockout occurs (approx after 30 seconds) during test,
reset appliance as required until test complete.
Ensure no demand, Set to ECO mode, ECO button illuminated which turns off the pre-heat function.
Test 1:
Measure for AC Voltage across terminals 2 (Brown) and 4 (Yellow) of connector ST5 and
note the reading.
Test 2:
Turn Hot Water Tap On
Measure for AC Voltage across terminals 2 (Brown) and 4 (Yellow) of connector ST5 again.
Expect an increase in voltage of approximately 1.3 VAC or greater from the original voltage
measured on the first test.
NOTE: If appliance lockout occurs (approx after 30 seconds) during test,
reset appliance as required until test complete.
Isolate as per TOPs P4
and refit as necessary