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Troubleshooting

Low temperature thermostat

We strongly suggest that you install one thermostat used for low temperature detection (around 46 F

or 8 C). Connect this thermostat in parallel with the heating relay or auxiliary heating relay. Therefore,

should CARDIO be defective, there will be another security device.

Only one sub-system does not work

(heating or cooling or fan)

1. check connections on terminal blocks;

2. check relays, wiring and breakers associated with these systems.

The touch screen does not show the right temperature

For various reasons, temperature readings at the screen may differ from temperature readings

elsewhere in the room. Use “compensation of the temperature” in the Temperature menu of the

Installer configuring menu.

Quick cycling of the temperature control system

This is due to the screens being to close to heating/cooling source.

1. give more inertia to CARDIO’s temperature control sensitivity by setting the right data in

“hysteresis” ( see p.13).

!WARNING!: read technical specifications of relays to be installed. CARDIO’s relays

only allow loads with the following characteristics:

Resistive: 24VAC

Inductive: 24VAC

If you use relays with higher than 24VAC, protection circuits will be damaged.

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