Category Issue Possible Cause Solution
Sensor
The door status sensor is
sending alerts.
Unit doors are not fully closed. Close all unit doors.
Poorly installed or damaged door
state microswitch.
Contact Vertiv TechnicalSupport.
The belt flood sensor is
sending alerts.
Water enters the detection zone
area.
Check the engine room for leaks
Air conditioning condensate
leaks.
Check that the condensate pipe connection is reliable
Cooling
The air conditioning
equipment does not start.
Device is unplugged. Check the input voltage of the device.
Circuit breaker controlling the
voltage is open (on the
transformer).
Look for a short circuit and reset the open switch.
Excessively high water level for
the condensate pump and
disconnected water level switch
relay.
Check that the drains and lines are blocked or that the
condensate pump is damaged
Jumper cable is in the wrong
position.
Check the interface board jumper cable
The air conditioning is not
cooled.
The contactor of the compressor
is in poor contact
Check that the interface board J74 port voltage is 24 Vac ± 2
Vac. If so, check the contactor body
Excessively high exhaust
pressure from the compressor.
Refer to the inspection and repair instructions for the "High
Voltage Alarm" item below
Blocked filter. Clean or replace the filter
Low refrigerant charge.
Check the pressure with a composite pressure gauge to see
if there are obvious bubbles in the mirror
Pressure
Air conditioning high-
pressure alarm.
Limited condensation air.
Remove impurities from the surface of the coil or near the air
entrance
Condenser is not turning.
Check that the fan speed controller wiring is loose, outdoor
machine wiring is loose, fan speed control controller L1 has
an output, and condensation pressure sensor is OK
Air conditioning low
pressure alarm.
Refrigerant leak. Find the leak point and replenish the refrigerant
Low ambient temperature
outside.
Contact your local service engineer for processing
Outdoor fan operates at full
speed at low outdoor ambient
temperatures.
Check that the L1 of the fan speed controller is on with L and
that the connection between the condensation pressure
sensor and the fan speed controller is loose
Table 11.2 SmartRow™ 2 Troubleshooting (continued)
11 Troubleshooting Proprietary and Confidential ©2024 Vertiv Group Corp. 117
Vertiv™ SmartRow™ 2 Infrastructure Solution User Guide
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