Problem

Possible Cause

Corrective Action

Head pressure too

• Low refrigerant charge

• Check subcooling and ensure it is at least

low

• Condenser fan settings too low

10-15°F. Repair leak and recharge system.

 

• Adjust condenser fan setpoints.

 

• Condenser water regulating valve

• Check water regulating valve, actuator, and

 

malfunction

linkage for proper operation.

 

• System requires flooded

• Install flooded condenser controls.

 

condenser control during low

 

 

ambient conditions

 

 

 

 

Humidifier

• Humidification mode disabled

• Enable humidification mode.

inoperative

• Humidification setpoint too low

• Raise humidification setpoint.

 

• Humidifier is in alarm

• Check front panel display for active humidifier

 

 

alarms.

 

• Humidifier canister full of

• Replace humidifier canister.

 

sediment

• Check for shorted wiring, excessive current

 

• Blown fuse or fuses

 

 

draw, and proper input voltage. Replace fuse

 

 

or fuses with the specified type.

 

• No power to electrodes

• Check contactor, wiring, and connections.

 

 

 

Humidity control is

• 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.

 

• Humidification/dehumidification

• Check and adjust humidification and

 

setpoints not close enough

dehumidification setpoints.

 

• Humidifier sensitivity % setpoint

• Reduce humidifier sensitivity % setpoint.

 

too high

• Tune the PID loop for accurate

 

• Dehumidification PID loop is not

 

properly tuned

dehumidification operation.

 

• Return air humidity 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.

 

 

 

Module powered but

• System is off

• Turn the System on.

will not operate

• Remote shutdown or input contact

• Check input contact configuration settings.

 

is active

 

 

• System is in alarm

• Check front panel display for active system

 

 

alarms.

 

• System is idle (in group mode)

• Check group mode configuration settings.

 

 

 

Reheat elements

• Reheat mode disabled

• Enable reheat mode.

inoperative

• Reheat setpoint too low

• Raise reheat setpoint.

 

• Thermal cut out switch is open

• Reset switch and check for proper airflow

 

 

across heater.

 

• Blown fuse or fuses

• Check for shorted wiring, excessive current

 

 

draw, and proper input voltage. Replace the

 

 

fuse or fuses with the specified type.

 

• SCR controller malfunction

• Verify operation of SCR controller.

 

 

 

78

NetworkAIR FM DX 60 Hz Operation, Maintenance, and Troubleshooting

Page 87 Page 89
Page 88
Image 88
American Power Conversion DX, FM manual Problem Possible Cause Corrective Action
Page 87 Page 89

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.
Top Page Image Contents