Carel pCO1 User Manual

Modular Standard HP Chiller for Carel driver
Carel code +030221236- Rel. 1.0 dated 7 July 2003
24
10.2 SPECIAL FUNCTION "IGNORE"
+--------------------+
|State of driver 1 Ad|
| |
|Valve not shut |
|Ignore? N |
+--------------------+
There are three alarm conditions which prevent the driver from performing normal control (one of these is shown above ):
• an open valve % during the last blackout, the valve was not shut completely
• battery charge % the battery is not operating correctly or it is discharged or disconnected
• EEPROM restart % malfunctioning EEPROM
When one of these conditions is active, the following alarm appears:
+--------------------+
|AL074 |
|D1:Wait due to error|
|eeprom/batt.rechg.or|
|open valve |
+--------------------+
With the "Ignore" function, these alarms can be ignored to enable the driver to control the valve (otherwise the driver would keep the valve shut).
ATTENTION!
cancelling the alarms means ignoring them, and, therefore, we advise you to carefully check that the system is not damaged, is not
malfunctioning or does not become unreliable (e.g.: if "recharge battery" is signalled, this probably means that the battery is not charged or not
connected, etc. In the event of a blackout, this may not allow the valve to close. The valve would therefore stay shut even when the system restarts.
If none of the three above alarms is present, the screen changes over to the next screen:
+--------------------+
¦State of driver 1 Ad¦
¦ ¦
¦No fault ¦
¦ ¦
+--------------------+
11 COMPRESSOR ROTATION
The call rotation of the compressors is such that the number of hours and the number of starts-stops of different compressors are equal. Rotation
follows the FIFO Logic (First in first out), i.e. the first compressor to be activated is the first to be disabled. This behaviour may lead, at the
initial stage, to considerable differences in the operating hours of the compressors, however, the hours are very similar to each other in steady
state.
Rotation occurs only among the compressors and not among the capacity controls.
11.1 ROTATION-FREE MANAGEMENT
• Power-up sequence: C1,C2,C3,C4
• Power-down sequence: C4,C3,C2,C1
11.2 MANAGEMENT WITH FIFO ROTATION (FIRST IN FIRST OUT)
• Power-up sequence: C1,C2,C3,C4
• Power-down sequence: C1,C2,C3,C4

Carel pCO1 Specifications

General

Brand	Carel
Model	pCO1
Category	Chiller
Language	English