American Power Conversion FM, DX guide

Problem	Possible Cause	Corrective Action
Suction pressure too	• Dirty or blocked evaporator coil	• Clean evaporator coil.
low	• Dirty or blocked air filters	• Check filters and replace as needed.
	• Low airflow	• Check for correct airflow setting.
	• Low return air temperature	• Verify the return air temperature is not below
		20ºC (68°F).
		• Check for short cycling of cold supply air.
	• Low refrigerant charge	• Check subcooling and ensure it is at least
	• Liquid line filter drier is blocked	10-15°F. Repair leak and recharge system
	• Liquid line filter drier is blocked	• Check filter drier for excessive pressure drop.
	• High evaporator superheat	• Check for proper superheat and TXV
		operation.

System short of	• Low refrigerant charge	• Check subcooling and ensure it is at least
capacity	• Liquid line filter drier is blocked	10-15°F. Repair leak and recharge system.
	• Liquid line filter drier is blocked	• Check filter drier for excessive pressure drop.
	• High evaporator superheat	• Check for proper superheat and TXV
	• Insufficient air quantity across the	operation.
	• Insufficient air quantity across the	• Check for correct airflow and clean filters.
	evaporator coil
	• Excessive outside air infiltration	• Reduce outside air infiltration.
	• Lack of proper room vapor barrier	• Install vapor barrier materials on floor, walls,
		and ceiling as needed.

Temperature control	• Excessive outside air infiltration	• Reduce outside air infiltration.
not tight enough	• Lack of proper room vapor barrier	• Install vapor barrier materials on floor, walls,
		and ceiling as needed.
	• Cool/reheat setpoints not close	• Check cooling and reheat setpoints and
	enough	deadbands.
	• Reheat PID loop is not properly	• Tune the PID loop for accurate reheat
	tuned	operation.
	• Interstage delay is too large	• Reduce the interstage delay to allow quicker
		response to temperature changes.
	• Return air temperature does not	• Check for short cycling of cold supply air.
	reflect actual room condition	• Check air distribution for deficiencies.
		• Consider using remote sensor control.
		Note: Be certain to purchase the correct
		temperature and humidity probe. Check when
		ordering that your equipment is compatible.

Water carryover	• Dirt or oil residue on evaporator	• Clean the evaporator coil.
	coil	• Check for correct airflow and clean filters.
	• Insufficient air quantity across the	• Check for correct airflow and clean filters.
	evaporator coil	• Reduce airflow to specifications.
	• Excessive airflow across the	• Reduce airflow to specifications.
	evaporator coil	• Clean condensate pan and drain line.
	• Blockage in condensate pan or	• Clean condensate pan and drain line.
	drain line	• Verify the return air temperature is not below
	• Low return air temperature	• Verify the return air temperature is not below
		20ºC (68ºF).
		• Check for short cycling of cold supply air
	• High return humidity	• Lower humidity setpoint.
		• Check for short cycling of supply air
	• Excessive outside air infiltration	• Reduce outside air infiltration.
	• Lack of proper room vapor barrier	• Install vapor barrier materials on floor, walls,
		and ceiling as needed.

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