11
Error Messages
Whenever a fault is detected in any of the sensors and / or room temperature units (RTUs), the indicator lights will flash in specific ways,
to indicate the location of the problem. For detailed Sensor and RTU testing instructions see Data Brochures D 070, D 074 and D 054.
RTU 1 short circuit
RTU 2 short circuit
RTU 3 short circuit
RTU 4 short circuit
Power
Heat Required
Occupied
Optimum Start / Stop
UnOccupied
Timer Active
Power
Heat Required
Occupied
Optimum Start / Stop
UnOccupied
Timer Active
Power
Heat Required
Occupied
Optimum Start / Stop
UnOccupied
Timer Active
Power
Heat Required
Occupied
Optimum Start / Stop
UnOccupied
Timer Active
RTU 1 Temperature sensor open
Power
Heat Required
Occupied
Optimum Start / Stop
UnOccupied
Timer Active
RTU 3 Temperature sensor open
Power
Heat Required
Occupied
Optimum Start / Stop
UnOccupied
Timer Active
RTU 4 Temperature sensor open
Power
Heat Required
Occupied
Optimum Start / Stop
UnOccupied
Timer Active
RTU 2 Temperature sensor open
Power
Heat Required
Occupied
Optimum Start / Stop
UnOccupied
Timer Active
Internal fault
Power
Heat Required
Occupied
Optimum Start / Stop
UnOccupied
Timer Active
Zo — in short circuit
Power
Heat Required
Occupied
Optimum Start / Stop
UnOccupied
Timer Active
Light on continually
Light flashing
Light off
