Modular Standard HP Chiller for Carel driver
Carel code +030221236- Rel. 1.0 dated 7 July 2003
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If the battery temperature/pressure remains below the defrosting start set-point for a cumulative time equal to defrosting delay time, the circuit
in question enters a defrosting cycle.
• the system's refrigerating capacity reaches maximum value
• the refrigerating circuit is reversed with the 4-way valve
• the fan in question is switched OFF (if pressure probes are installed, the fan can come into operation at a certain threshold to prevent the
circuit entering high pressure)
The circuit leaves the defrosting cycle due to temperature/pressure (if battery temperature exceeds the defrosting stop set-point) or due to
maximum time if the defrosting cycle exceeds the set maximum time threshold.
Defrosting a circuit with time/pressure switches control:
control is exactly the same, with the difference that the status of the pressure switches is counted rather than temperature/pressure.
The fans are usually OFF during the defrosting cycle. They are activated only if the pressure probes were enabled and pressure exceeds the
prevent threshold - in this way the unit is prevented from going into high pressure alarm status.
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