Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
CH Demand
Selector switch ON
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
Test 1 :
Measure voltage on connector CN4 between pins 3 and 4 marked remote room stat.
The Voltage should be approximately 5Vdc
Test 2 :
Apply a demand and measure the voltage on connector CN4 between pins 3 and 4 marked remote stat.
The Voltage should drop to approximately 0 Vdc
Measure voltage on connector CN4 between pins 3 and 4 marked remote room stat.
The Voltage should be approximately 5Vdc
Test 2 :
Apply a demand and measure the voltage on connector CN4 between pins 3 and 4 marked remote stat.
The Voltage should drop to approximately 0 Vdc
