Vertiv I VRC Self-Contained System I User Manual
Compressor runs at high speed
Check if the compressor is out of control
The drainage pan or pipe is loose or
blocked
Check if drainage pipe is loose or clean the debris
in the drainage pan or pipe
Compressor
vibration or
abnormal noise
The mounting position is not even
Check mounting position state
The fixing parts are loose
Check the fixing nuts of compressor and fasten
again
Call the customer service hotline of Vertiv
8.2 Fan Troubleshooting
Fan troubleshooting is listed in Table 8-2.
Table 8-2 Fan fault diagnosis and handling
Check Items and Handling Methods
The circuit breaker
is open
Check if the fan circuit breaker is closed.
Check the Fan power module alarm indicator to see if the control board
fails
Check whether the cable from the main control board, fan fault detection
board, or power module to the control terminal bar is firmly connected.
Check whether the cable from the control terminal bar to the plug wire
terminal of the fan is firmly connected.
8.3 Fault Diagnosis and Handling of Electronic Expansion Valve
As a key component for refrigerant system and cooling capacity adjustment, the electronic expansion valve
is important. Table 8-3 describes the fault diagnosis and handling methods.
Table 8-3 Fault diagnosis and handling methods
Check Items and Handling Methods
The
adjustment of
the electronic
expansion
valve is faulty.
The temperature
sensor or pressure
sensor is faulty.
Check whether the sensor cable is firmly connected.
Check whether the sensor cable position on the control board is
correct.
The control board is
powered off.
Check whether the output fuse of the transformer has
tripped/broken.
Check whether the input power of the control board of the
electronic expansion valve is a 24 V power supply.
The cable connection
of the control board
is faulty.
Check whether the valve cable connection on the control board of
the electronic expansion valve is faulty.
Check whether the communication cable between the electronic
expansion valve control board and the main control board is
properly connected.
8.4 Fault Diagnosis and Handling of the Air Conditioning System
When the air conditioning system component is faulty, identify the causes and tackle the problem to
ensure normal operation of the unit. Table 8-4 describes the major faults and troubleshooting methods.
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