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7.3.2
Actuator of the control valve
Maintenance
Notice
Damage to the actuator!
The actuator can be damaged as a result of improper handling.
Only qualified and specialised personnel is authorised to perform the installation and
start-up.
1.
Switch the cooling system off via the control unit.
2.
Wait for approximately 2 minutes. During this time, the valve will close
automatically.
3.
Disconnect the cooling module from the operating voltage supply and secure it so
that it cannot be reconnected.
Note
•
The cooling module must be disconnected from the power supply in order to
replace the electrical actuator.
•
Switching it off by way of the standby key does not disconnect the operating
voltage. In this case, the actuator is still supplied with voltage. As a result, the
actuator can be damaged when it is removed or installed.
4.
Dismantle protection grid.
Notice
Damage to the temperature sensors!
The temperature sensors are fixed to the protective grid and may be damaged when
removing the protective grid.
•
Carefully remove protective grid.
•
If necessary, undo temperature sensors from protective grid.
5.
Disconnect the plug of the actuator.
VARISTAR Cooling unit SHX 30
55
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