Vertiv VRC1 Series User Manual

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Vertiv I VRC Self-Contained System I User Manual
8 Troubleshooting
This chapter introduces the failure diagnosis and troubleshooting and can be used together with the alarm
section in Chapter 5.
WARNING! Certain circuits carry lethal voltages. Only professional technicians are allowed to
maintain the unit. Extra precautions should be taken when troubleshooting a live unit. Be
particularly careful troubleshooting with the unit’s power switched on.
WARNING! If jumpers are used for troubleshooting, make sure to remove the jumpers after
troubleshooting. If the connected jumpers are not removed, they may bypass certain control
functions causing damage to the equipment.
8.1 Troubleshooting
Troubleshooting for the entire unit is listed in Table 8-1, below.
Table 8-1 Troubleshooting for Unit
Fault Occurrence
Possible Cause
Check or Remedy
High temperature
alarm
Unreasonably high temperature
alarm setpoint
Check and reset high temperature alarm setpoint
Overload condition
Check whether the max. actual heating load is
over the rated value
Condenser fan does not run
normally or is faulty
Check if the fan power cable is disconnected
Compressor does not run normally
Check if the compressor power cable is
disconnected
Low temperature
alarm
Unreasonably low temperature
alarm setpoint
Check and reset low temperature alarm setpoint
Evaporator fan does not run
normally or is faulty
Check if the fan power cable is disconnected
Compressor does not run normally
Check to see if the compressor power cable is
disconnected
High pressure
alarm
Condenser fan does not run
normally or is faulty
Check if the fan power cable is disconnected
High pressure sensor is abnormal
Check if the high-pressure sensor is normal
Insufficient condensing airflow
Remove debris from the coil and air inlet
Check if the fan speed controller operates
normally
Low pressure
alarm
Refrigerant leakage
Check for leaking points and re-charge refrigerant
Condenser fan runs at full speed
when ambient temperature is too
low
Check if wire connection of outdoor fan is
reversed
EEV adjusts abnormally or is closed
Check if the EEV coil or EEV cable is loose
Evaporator fan does not run
normally or is faulty
Check if the cable of fan is disconnected
Insufficient airflow across
evaporator coil
Remove debris from the coil and air inlet
Severe
condensation or
The air humidity is too high
Use other dehumidifier to control the air humidity
EEV adjusts abnormally
Check if the EEV coil or EEV cable is loose

Vertiv VRC1 Series Specifications

General

Brand	Vertiv
Model	VRC1 Series
Category	Freezer
Language	English