Problem

Possible Cause

Corrective Action

Compressor fails to

• Cooling mode disabled

• Enable cooling mode.

start

• Cooling setpoint too high

• Adjust the cooling setpoint below the return

 

 

air temperature by at least 4°F (2°C) to

 

 

activate the compressor or compressors.

 

• Compressor circuit breaker is

• Check the compressor windings and verify

 

tripped

open or short to ground windings. Reset the

 

 

circuit breaker and check the compressor

 

 

contactor load side for proper voltage to the

 

 

compressor.

 

• System is in alarm

• Check front panel display for active system

 

 

alarms.

 

• Head pressure alarm, high

• For air cooled systems, check the condenser

 

pressure switch is open

coil for air-obstructions, fan operation, and

 

 

settings. Manually reset the high pressure

 

 

switch.

 

 

• For water cooled systems, check the condenser

 

 

water flow rate and water supply temperature.

 

 

Check the pressure drop across the heat

 

 

exchanger. Check and clean field installed

 

 

strainers. Check the water regulating valve,

 

 

actuator, and linkage for proper operation.

 

 

• For glycol cooled systems, check the fluid

 

 

cooler coil for air obstructions and proper fan

 

 

operation. Check the water flow rate and water

 

 

supply temperature. Check the pressure drop

 

 

across the heat exchanger. Check and clean

 

 

field installed strainers. Check water

 

 

regulating valve, actuator, and linkage for

 

 

proper operation.

 

• Low suction pressure

• Check for a restriction in the filter drier.

 

 

• Check for power at the liquid line solenoid

 

 

coils. Check solenoid coil and valve operation.

 

 

• Check for proper TXV operation and

 

 

superheat.

 

 

• Check refrigerant charge, check system for

 

 

leaks.

 

 

• Verify the return air temperature is not below

 

 

68°F.

 

• Compressor thermal overload is

• Check for low head pressure.

 

• Check compressor shell temperature. Check

 

open

compressor for open windings and allow

 

 

sufficient time for the compressor to cool

 

 

down to room temperature. After the thermal

 

 

overload resets, determine the cause of the

 

 

failure.

 

• Compressor failure

• Determine the cause of failure and replace the

 

 

compressor set.

 

 

 

76

NetworkAIR FM DX 60 Hz Operation, Maintenance, and Troubleshooting

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American Power Conversion DX, FM manual Problem Possible Cause Corrective Action

DX, FM specifications

The American Power Conversion (APC) DX,FM series represents a cutting-edge solution designed for critical power management and uninterruptible power supply (UPS) applications. Aimed at businesses and data centers that require robust power protection, this series balances high-performance capabilities with advanced technology features.

One of the key distinguishing features of the DX,FM series is its modular design. This allows users to scale their UPS system according to their needs, making it suitable for a variety of environments. Whether you're managing a small server room or a large data center, the modular architecture ensures that you can add or remove capacity with ease. This flexibility not only optimizes initial investments but also supports future growth seamlessly.

The series employs advanced battery technology, which extends battery life and enhances overall performance. With intelligent battery management systems, the DX,FM ensures that battery health is monitored in real-time, preventing premature failures and unnecessary replacements. This leads to reduced maintenance costs and maximizes uptime.

Additionally, the DX,FM series features innovative cooling solutions that enhance performance in high-density situations. Efficient thermal management reduces the risk of overheating, keeping valuable equipment operating optimally. This is particularly crucial in data centers where heat generated by servers can create potential disruptions.

Another significant characteristic of the DX,FM series is its sophisticated monitoring and management capabilities. Integrated with state-of-the-art software, users can gain remote access to their UPS units, enabling real-time tracking of performance metrics. This remote monitoring capability allows administrators to proactively manage power usage and ensure that systems are operating within safe parameters.

Furthermore, the DX,FM series is designed with a high level of redundancy. This built-in reliability feature ensures that if one unit fails, others can seamlessly take over, maintaining power supply continuity. This is critical for mission-critical environments where power outages could result in substantial financial losses or data loss.

In summary, the American Power Conversion DX,FM series incorporates modularity, advanced battery technology, effective cooling solutions, and sophisticated monitoring features to deliver an ideal power management solution for various organizations. Its design prioritizes flexibility, reliability, and efficiency, making it an essential investment for any business looking to safeguard its operations against power disruptions.