American Power Conversion FM, DX specification

Problem	Possible Cause	Corrective Action
Compressor noisy	• Compressor or compressors may	• Verify the pressure differential across the
	be rotating in the wrong direction	suction and discharge for each compressor. If
		no differential is present, verify the correct
		phasing to each compressor.
	• Liquid slugging	• Check for low evaporator superheat.
		• Check operation of crankcase heaters.
		• Verify liquid line solenoid valves close tightly
		during the off cycle. Check for obstructions
		which may prevent the valve from closing.
	• High head pressure	• Check operating head pressure.

Controls erratic or	• Control transformer problem	• Check control transformers for proper input
inoperative		voltage.
		• Check control transformer secondary voltage.
		Output should be within + or - 10% of rated
		output.
	• Loose or broken wiring	• Check wiring for loose or broken connections.
	• Module configured incorrectly	• Set module configuration according to
		nameplate and options selected.
	• System is in alarm	• Check front panel display for active system
		alarm.

Evaporator coil ices	• Dirty or blocked evaporator coil	• Clean evaporator coil.
	• Dirty or blocked air filters	• Check filters and replace as needed.
	• Low airflow	• Check for correct airflow setting.
	• Low evaporator superheat	• Check superhear and adjust to 10-15°F.
	• Low return air temperature	• Verify the return air temperature is not below
		20ºC (68°F).
	• Low refrigerant charge	• Check for short cycling of cold supply air.
	• Low refrigerant charge	• Check subcooling and ensure it is at least
		10-15°F. Repair leak and recharge system.
Head pressure too	• Air cooled condenser malfunction	• Check and clean the condenser coil. Check
high		condenser fan operation and settings.
	• Condenser water regulating valve	• Check water regulating valve, actuator, and
	malfunction	linkage for proper operation.
	• Overcharge of refrigerant	• Remove excess refrigerant from system.
	• Non-condensable in system	• Recover refrigerant charge, evacuate system
		and recharge.
	• Fluid cooler malfunction	• Check and clean the fluid cooler coil. Check
		fluid cooler fan operation.
	• Fluid pump malfunction	• Check pump operation.
	• Low fluid flow	• For water cooled systems, check the condenser
		water flow rate and water supply temperature.
		Check pressure drop across the heat
		exchanger. Check and clean field installed
		strainers.
		• For glycol cooled systems, check the water
		flow rate and water supply temperature. Check
		pressure drop across the heat exchanger.
	• Glycol concentration higher than	Check and clean field installed strainers.
	40%	• Verify glycol concentration, reduce to
		maximum 40%.

NetworkAIR FM DX 60 Hz Operation, Maintenance, and Troubleshooting

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.

Problem

Possible Cause

Corrective Action

DX, FM specifications