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Liebert XDC Alarms Descriptions

In document System Design Manual (сторінка 139-142)

CALL SERVICE—Activated when Customer Input 1 is configured for “Call Service” and 24VAC is applied to the input. This alarm is reset when the 24VAC is removed.

COMP 1A HIGH PRESSURE—Activated when the control senses a high head pressure signal from Compressor 1A . This alarm will reset when the main power is cycled or the HP 1A Alarm Code variable in the Service Diagnostics menu is reset to 0.

COMP 1B HIGH PRESSURE—Activated when the control senses a high head pressure signal from Compressor 1B. This alarm will reset when the main power is cycled or the HP 1B Alarm Code variable in the Service Diagnostics menu is reset to 0.

COMP 2A HIGH PRESSURE—Activated when the control senses a high head pressure signal from Compressor 2A. This alarm will reset when the control power is cycled or the HP 2A Alarm Code variable in the Service Diagnostics menu is reset to 0.

COMP 2B HIGH PRESSURE—Activated when the control senses a high head pressure signal from Compressor 2B by the control. This alarm will reset when the main power is cycled or the HP 2B Alarm Code variable in the Service Diagnostics menu is reset to 0.

COMP 1A SHORT CYCLE—Activated when Compressor 1A turns On, Off, then back On, 10 times within 1 hour. The alarm will reset itself when the control turns Compressor 1A On, then Off fewer than 10 times within 1 hour of operating time for 1.5 hours.

Setpoints View and change

operational setpoints

Unit Diary Shows all program

changes and maintenance performed,

Maintenance/

Wellness Settings Shows all mainte- nance records, cal-

culates next maintenance date

Diagnostics/

Service Mode Enter Diagnostics/

Service Mode for troubleshooting

and repair

Set Alarms Change settings for

alarms

Sensor Calibration/Setup Setup and calibrate sensors for site

Network Setup or alter network setting.

Options Setup Enter specific settings for various

options

Smart Module Setup of alarms and events. Set temperature limits

for supply and return sensors.

Label smart modules, view firmware version.

Service Contacts Contains key contact information

for service

NOTE

Alarms must be acknowledged before they can be reset. To acknowledge or silence an alarm, press the ALARM key one time. This will silence the alarm; the red LED will remain

illuminated until the alarm is reset.

°C / °F

% RH

SET

WELLNESS SERVICE

SET ALARMS

+ / -

NETWORK

SET

UP

XDIO

COMP 1B SHORT CYCLE—Activated when Compressor 1B turns On, Off, then back On, 10 times within 1 hour. The alarm will reset itself when the control turns Compressor 1B On, then Off fewer than 10 times within 1 hour of operating time for 1.5 hours.

COMP 2A SHORT CYCLE—Activated when Compressor 2A turns On, Off, then back On, five times within 10 minutes or 10 times within 1 hour. The alarm will reset itself when the control turns Compressor 2A On, then Off fewer than 10 times within 1 hour of operating time for 1.5 hours.

COMP 2B SHORT CYCLE—Activated when Compressor 2B turns On, Off, then back On, five times within 10 minutes or 10 times within 1 hour. The alarm will reset itself when the control turns Compressor 2B On, then Off fewer than 10 times within 1 hour of operating time for 1.5 hours.

COMPRESSOR(S) LOCKOUT—Activated when Customer Input 1 is configured for “Comp Lock PD” and 24VAC is applied to the input. This alarm is reset when the 24VAC is removed.

CONDENSATION DETECTED (optional)—Activated when water is detected at a cooling module. A 24VAC signal is applied to the condensation input on the control board using a twisted pair of wires or the alarm is sent via CANbus communication. When this alarm is active, the control will raise its refrigerant control point by 4°F (2.2°C). This alarm will reset when the alarms is acknowledged and the signal stops being sent from CANbus or condensation input. The alarm can also be reset by cycling the power. The main power must be cycled to remove the 4°F (2.2°C) offset.

CUSTOMER INPUT 1—Activated when a 24VAC signal is applied to the customer alarm input on the control board. This alarm will reset when the 24VAC signal stops being sent from the customer alarm input. WATER UNDER FLOOR, SMOKE DETECTED, CALL SERVICE and COMP LOCK PD are possible designations for this alarm; they are set with the Unit Code.

FAN FAILURE (optional)—Activated when a 24VAC signal is applied to the fan failure input on the control board using a twisted pair of wires or the alarm is sent via CANbus communication.

This alarm will reset when the alarms is acknowledged and the signal stops being sent from CANbus or fan failure input. The alarm can also be reset by cycling the power.

HIGH DEW POINT—Activates when the calculated dew point at either Sensor A or B exceeds the user-specified alaram setpoint. The alarm will reset when the calculated room dew point from both Sensor A and Sensor B is 2°F (1.1°C) below the setpoint and the alarm has been

acknowledged.

HIGH REFRIGERANT TEMP—Activated when the refrigerant temperature sensor reads the refrigerant temperature above the user-specified alarm setpoint. This alarm will reset when the reading from the refrigerant temperature sensor drops 2°F (1.1°C) below the user-specified setpoint and the alarm has been acknowledged.

HIGH TEMP SENSOR A—Activated when the reading from Sensor A is above the user- specified alarm setpoint. The alarm will reset when the reading from Sensor A drops 2°F (1.1°C) below the setpoint and the alarm has been acknowledged.

HIGH TEMP SENSOR B—Activated when the reading from Sensor B is above the user- specified alarm setpoint. The alarm will reset when the reading from Sensor B drops 2°F (1.1°C) below the setpoint and the alarm has been acknowledged.

LOSS OF FLOW PUMP 1—Activated when Pump 1 is commanded to run and the differential pressure switch does not sense differential pressure (set at 6 psi; 41kPa; 0.41 bars). After attempting to start Pump 1 three times, the Liebert XDC will automatically switch to the other pump to establish flow. This alarm will reset when flow has been established on Pump 1 and the alarm has been acknowledged.

LOSS OF FLOW PUMP 2—Activated when Pump 2 is commanded to run and the differential pressure switch does not sense differential pressure (set at 6 psi; 41kPa; 0.41 bars). After attempting to start Pump 2 three times, the Liebert XDC will automatically switch to the other pump to establish flow. This alarm will reset when flow has been established on Pump 2 and the alarm has been acknowledged.

LOW MEMORY—Activated when the control board is low in memory resources. This alarm rests automatically as soon as memory consumption falls below the threshold.

LOW REFRIGERANT TEMP—Activated when the supply refrigerant temperature sensor temperature reading drops below the higher of the two calculated dew points, assuming that neither Sensor A or Sensor B has a sensor failure alarm. This alarm will reset when the refrigerant temperature sensor reads the refrigerant temperature above both of the two

calculated dew points and the alarm has been acknowledged. This alarm can lock the unit Off. If this occurs, the main power must be cycled, or the Low Refrig Temp Alarm Code in the Service Diagnostics menu must be reset to 0.

LOW TEMP SENSOR A—Activates when the reading from Sensor A drops below the user- specified alarm setpoint. The alarm will reset when the reading from Sensor A rises 2°F (1.1°C) above the setpoint and the alarm has been acknowledged.

LOW TEMP SENSOR B—Activates when the reading from Sensor B drops below the user- specified alarm setpoint. The alarm will reset when the reading from Sensor B rises 2°F (1.1°C) above the setpoint and the alarm has been acknowledged.

NODEX CONDENSATION DETEC—Activated when condensation is detected on a smart module at CAN node ID X, where X is a value ranging from 81 to 100. This alarm resets when condensate is no longer detected. The main power must be cycled off to remove the 4°F (2.2°C) offset value.

NODEX FAN FAILURE—Activated when a fan failure occurs on a smart module at CAN node ID X, where X is a value ranging from 81 to 100. The alarm will rest when the fan returns to normal operation.

NODEX LOCAL SHUT DOWN—Activated when a smart module at CAN node ID X, where X is a value ranging from 81 to 100, has been shut down by an external signal. This alarm will reset when the remote shutdown input is deactivated.

NODEX RETURNAIR TEMPLIMT—Activated when the return air temperature (entering air temperature to the module) exceeds the user-specified return air temperature range on a smart module at CAN node ID X, where X is a value ranging from 81 to 100. This alarm will reset when the return air temperature return to with the user-specified range.

NODEX SENSOR FAILURE—Activated when a smart module at CAN node ID X, where X is a value ranging from 81 to 100, stops receiving a signal from one or more of its supply air, return air, or refrigerant temperature sensors. This alarm will reset when signals are detected from the module's sensors.

NODEX SUPPLYAIR TEMPLIMT—Activated when the supply air temperature (temperature of the air leaving the module) exceeds the user-specified supply air temperature range on a smart module at CAN node ID X, where X is a value ranging from 81 to 100. This alarm will reset when the return air temperature return to with the user-specified range.

PUMP SHORT CYCLE—Activated when the Liebert XDC is trying to establish flow (differential pressure) and is unable to do so. The Liebert XDC will attempt three times to establish flow on a pump before trying the other pump. The control will keep cycling three times on one pump, then three times on the other pump until it is able to establish flow (differential pressure). If this cycling occurs for 30 minutes and the Liebert XDC still does not establish flow, a PUMP SHORT CYCLE alarm will be present. This alarm will shut down the Liebert XDC. To reset this alarm, the main power must be cycled.

RAM/BATTERY FAIL—Activated when the RAM backup battery or the RAM itself has failed.

This requires a hardware replacement.

SENSOR A FAILURE—Activated when the controls no longer senses a signal from Sensor A.

This alarm will reset when the signal is returned and the alarms has been acknowledged.

SENSOR B FAILURE— Activated when the controls no longer senses a signal from Sensor B.

This alarm will reset when the signal is returned and the alarm has been acknowledged.

SMOKE DETECTED—Activated when the Customer Input 1 is configured for “Smoke” and 24VAC is applied to the input. This alarm is reset when the 24VAC is removed.

SUPPLY REFRIGERANT SENSOR FAILURE—Activated when the control no longer senses a signal from the supply refrigerant sensor. This alarm will reset when the signal is returned.

NOTE

This is not a room smoke detector and is not intended to replace external smoke detectors.

TANDEM BANK 1 LP—Activated when the low-pressure switch for Tandem Compressor Bank 1 doesn't send the proper signal during normal operation, or during pump-down. This alarm will reset when the main power is cycled or the Tandem Bank 1 LP Code variable in the Service Diagnostics menu is reset to 0.

TANDEM BANK 2 LP—Activated when the low-pressure switch for Tandem Compressor Bank 2 doesn't send the proper signal during normal operation, or during pump-down. This alarm will reset when the main power is cycled or the Tandem Bank 2 LP Code variable in the Service Diagnostics menu is reset to 0.

TANDEM BANK 1 PD—Activated when Tandem Compressor Bank 1 suction pressure cannot be pumped down below the threshold during compressor shutdown. This alarm will reset when the main power is cycled or the Tandem Bank 1 PD Alarm Code variable in the Service

Diagnostics menu is reset to 0.

TANDEM BANK 2 PD—Activated when Tandem Compressor Bank 2 suction pressure cannot be pumped down below the threshold during compressor shutdown. This alarm will reset when the main power is cycled or the Tandem Bank 2 PD Alarm Code variable in the Service Diagnostics menu is reset to 0.

UNIT CODE MISSING—Activated when a valid unit code has not been entered and saved. To reset, enter valid unit code, save and execute.

WATER UNDER FLOOR—Activated when Customer Input 1 is configured for “Water Alarm”

and 24VAC is applied to the input. This alarm is reset when the 24VAC is removed.

In document System Design Manual (сторінка 139-142)