Distech Controls RT Series User Manual

31
Troubleshooting guide
Heatpump models
Auxiliary heat does not
operate
Wrong mode selected
Select emergency heat mode
Thermostat in Unoccupied
mode
Select Override to force the thermostat Occupied
heating setpoint
Anticycle delay active
Wait, the anticycling period will end and the
equipment will start
Heating setpoint is satisfied
Raise the Heating setpoint
High Balance point attained
1. Mode is locked out based on outside air
temperature
2. Change configuration parameter High BP to value
90 °F ( 32 °C ) to by-pass lockout
Heating lockout attained
1. Mode is locked out based on outside air
temperature
2. Change configuration parameter H Lock to value
120 °F ( 49 °C ) to by-pass lockout
Wiring error
1. Start the Fan by forcing the Fan ON mode
2. Put a jumper across terminals RH & W1. The
heating should come ON. If it does not, verify wiring
and check if a jumper is required between RC & RH
Heat pump does not
operate in heating
mode
Wrong mode selected
Select heating mode
Thermostat in Unoccupied
mode
Select Override to force the thermostat Occupied
heating setpoint
Anticycle delay active
Wait, the anticycling period will end and the
equipment will start
Heating setpoint is satisfied
Raise the Heating setpoint
Low Balance point attained
1. Mode is locked out based on outside air
temperature
2. Change configuration parameter Low BP to value -
12 °F ( -24 °C ) to by-pass lockout
Heating lockout attained
1. Mode is locked out based on outside air
temperature
2. Change configuration parameter H Lock to value
120 °F ( 49 °C ) to by-pass lockout
Wiring error
1. Start the Fan by forcing the Fan ON mode
2. Put a jumper across terminals RH & W1. The
heating should come ON. If it does not, verify wiring
and check if a jumper is required between RC & RH
Wrong reversing valve
configuration
1. Wrong selection of parameter Re Valve
2. Select O will energize the valve in cooling
operation. Valve is normally heat.
3. Select B will energize the valve in heating
operation. Valve is normally cool.

Distech Controls RT Series Specifications

General

Brand	Distech Controls
Model	RT Series
Category	Thermostat
Language	English