Burnham RTC (Return Temperature Control) Manuale di Installazione Scaricare il pdf (Pagina 23)

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Isolate the problem between the control and the system. Now that the sequence of operation is known and

the system is sketched, is the control operating the proper pumps and valves at the correct times? Is the

control receiving the correct signals from the system as to when it should be operating? Are the proper

items selected in the menus of the control for the device that is to be operated?

Test the contacts, voltages and sensors. Using a multimeter, ensure that the control is receiving adequate

voltage to the power terminals and the demand terminals as noted in the technical data. Use the

multimeter to determine if the internal contacts on the control are opening and closing correctly. Follow

the instructions in the Testing the Wiring section to simulate closed contacts on the terminal blocks as

required. Test the sensors and their wiring as described in the Test the Sensors section.

Isolate the

Problem

Test the Contacts,

Voltages and

Sensors

The control was unable to read a piece of information from its EEPROM. This error can be caused by

a noisy power source. The control will load the factory defaults and continue operation if possible. All

settings in the Adjust menu must be reviewed before the error will clear.

The control is no longer able to read the boiler sensor due to a short circuit. The control will continue

to enable the boiler and will operate the diverting valve at 30% output while there is a heat demand

and until the sensor problem is repaired. The control will also record the time without the boiler return

sensor. Locate and repair the problem as described in the Test the Sensors section. To clear the error

message from the control after the sensor has been repaired, press the Item button.

The control is no longer able to read the boiler sensor due to an open circuit. The control will continue

to enable the boiler and will operate the diverting valve at 30% output while there is a heat demand

and until the sensor problem is repaired. The control will also record the time without the boiler return

sensor. Locate and repair the problem as described in the Test the Sensors section. To clear the error

message from the control after the sensor has been repaired, press the Item button.

The control is no longer able to read the mix supply sensor due to a short circuit. In this case the control

will operate the diverting valve at 30% output as long as there is a heat demand and until the sensor

problem is repaired. Locate and repair the problem as described in the Test the Sensors section. To

clear the error message from the control after the sensor has been repaired, press the Item button.

The control is no longer able to read the mix supply sensor due to an open circuit. In this case the

control will operate the diverting valve at 30% output as long as there is a heat demand and until

the sensor problem is repaired. Locate and repair the problem as described in the Test the Sensors

section. To clear the error message from the control after the sensor has been repaired, press the Item

button. Note: If a diverting valve is not installed, set the outdoor design (OUTDR DSGN) setting to

OFF, power off the control and then re-power.

The control is no longer able to read the outdoor sensor due to a short circuit. In this case the control

targets the design mix supply temperature and continues operation. Locate and repair the problem as

described in the Test the Sensors section. To clear the error message from the control after the sensor

has been repaired, press the Item button.

The control is no longer able to read the outdoor sensor due to an open circuit. In this case the control

targets the design mix supply temperature and continues operation. Locate and repair the problem as

described in the Test the Sensors section. To clear the error message from the control after the sensor

has been repaired, press the Item button. Note: If a diverting valve is operated as a setpoint control,

set the outdoor design (OUTDR DSGN) setting to OFF.

Error Messages

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Burnham RTC (Return Temperature Control) Manuale di Installazione Pagina 23

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