Secant Cardio IIe Spezifikationen PDF herunterladen (Seite 28)

Troubleshooting

TEMPERATURE CONTROL (from CARDIO’s thermostat only)

Nothing works

Baseboard heaters

1. check breaker associated with baseboard heaters;

2. the transformer of heating relays (reading should be 24VAC);

3. check wiring;

4. check relays.

Central heating

1. check breakers associated with the heating system;

2. check connections on terminal blocks in central controller;

3. check the relay;

4. check the power supply of the heating system.

HVAC and Heat pump

1. check the system mode set in the Temperature menu in the installer configuring menu. It

should correspond to this type of system;

2. check connections on terminal blocks in central controller;

3. check relays;

4. check power supply of HVAC or heat pump.

How to check CARDIO relays

1. disconnect all heat control wiring at the terminal block in the the central controller;

2. connect your ohmmeter to the terminal block. If the contact is OPEN, reading should be 0.

3. from the screen, modify the desired temperature to make the relay change status. Each change of

status a modification of the resistance read on the ohmmeter. If there is no change of resistance

and you are sure that the temperature set point has been modify, the CARDIO relay is defective.

Central heating systems

When control wires are disconnected, you should read 24VAC between the “R” wire and any other

wire. If not, refer to the manual of this heating system.

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Secant Cardio IIe Spezifikationen Seite 28