Troubleshooting guide

MAGNUM VERSION 8 MANUAL REVISION 3.1
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ZONE 3 VLV CLOSG (XX): The unit is stable and the condenser liquid level is in ZONE 3 below the target
opening and the liquid level rate of change is not increasing at an acceptable rate; therefore, the valve must be
closed.
ZONE 4 VLV HOLDG (XX): The unit is stable and the condenser liquid level is in ZONE 4 and the valve position is
not being changed as the condenser liquid level rate of change is decreasing at an acceptable rate.
ZONE 4 VLV OPENG (XX): The unit is stable and the condenser liquid level is in ZONE 4 above the target
opening and the liquid level rate of change is not decreasing at an acceptable rate; therefore, the valve must be
opened.
ZONE 4 VLV CLOSG (XX): The unit is stable and the condenser liquid level is in ZONE 4 below the target
opening and the liquid level rate of change is not increasing at an acceptable rate; therefore, the valve must be
closed.
VLV FULLY OPENED (XX): The valve position is fully opened, 100%.
VLV FULLY CLOSED (XX): The valve position is fully closed, 0%.
CLLC Status viewed from MCS Connect 7.78.6.
The CLLC status is display as the first line of the Status screen.
1) The CLLC State.
2) The CLLC Time, this is the time in the display CLLC State.
3) Level, this is the level of the condenser liquid level.
4) Rate of Change, this is the change of the liquid level.
5) Valve State.
6) Valve %, if AO this is the actual value of the analog output; if RO then this is the value reported by the
sensor input of the valve position feedback pot.
7) Delay is the delay between valve adjustments.
CLLC Status viewed from MCS Magnum 7.78.7.
CLLC Determining Stable/Unstable Condition 7.78.8.
Once a compressor is turned on the CLLC will determine if the system is in a stable, chilled water temperature is within
an acceptable range, or unstable condition.