SCI ERV-24-HC11 Especificações descarregar pdf (Página 23)

16. Troubleshooting for Technician

Problem Solution

Check the thermostat for 24 VAC,

remove the front cover and test between Rc/Rh to C.

Check for good wiring connections at:

Rh (24 VAC for heat), Rc (24 VAC for cool), C (common).

The display is blank

If you are using one transformer for cool and heat, check that

the jumper is installed between Rc and Rh. Check that all

screws terminals are tight.

Check the Rc connection

Cool does not switch on

Check the Y1 connection

Check the Rh connection

Heat does not switch on

Check the W1 connection

In heat mode, unit blows cool air

Check the Auto Fan settings. The unit may be set to FAN

(shown in the display).

The unit displays low temperature

(32°F) all the time

The unit is not sensing the remote sensor.

The unit displays high temperature

(92°F) all the time

The unit is has a short circuit in the remote sensor.

The display shows the word

"PROGRAM" without the name of

the program period (wake, sleep,

etc)

The unit is in Override mode because the temperature set-point

was manually adjusted. The name of the program period will

reappear when the next program period starts.

The word “FAN” flashes without

Heat or Cool

This does not indicate a fault. It indicates that fan cycling is

active for ventilation and whole-house comfort mixing.

Displayed ambient temperature is

not accurate

Adjust the offset. See section 15. above.

1 2 ... 18 19 20 21 22 23 24

Sem comentários

SCI ERV-24-HC11 Especificações Página 23