American Power Conversion Central Air Conditioning System ユーザーズマニュアル

Env Temperature Low

• Verify that no supply air is fed directly back into the return air.
• Ensure that the alarm delay is not set too low. The delay should be long 

enough to allow the room temperature to stabilize after start-up.

• Verify that the temperature alarm threshold for the environmental (return or 

remote) sensors is below the cool and reheat setpoints.

• Verify that the Module is configured and equipped for the reheat mode.
• Ensure that the reheat mode is enabled (if your Module is equipped with 

reheat).

• Ensure that the reheat mode is not disabled because of an active user-defined 

input mapped to nonessential lockout. 

Fire Detected

• Follow the appropriate facility emergency protocol. N

: The purpose of 

the fire sensor is to warn you of possible equipment damage. It is NOT 
intended to provide a fire alarm system to protect the facility and the lives of 
its occupants.

• Confirm that the wiring connections are secured to the wiring harness.
• Verify the setting of the fire detector (fire stat).
• Replace the fire detector (fire stat).

Fluid Coil Actuator Fail

• Verify that the connections between the actuator and the controller board are 

correct and securely tightened.

• Confirm that the control voltage and signal voltage reach the actuator.
• Ensure that the proper Module configuration is defined for this Module, 

especially that the coil configuration and the actuator type are correct.

• Replace the Coil Fluid Actuator.

Group Configuration Invalid

• Check that the # Systems setting (Path: Main > Setup > Group > Group 

Config) agrees with the actual number of Systems connected to the Group. 
Increase this setting to match the number of connected Systems.

Group Configuration Conflict

• Verify the Group configuration settings (Path: Main > Setup > Group) are 

correct. The Group detected one or more Systems in the Group to have 
different Group configuration settings and changed that System’s settings.

Group Fatal Fire Shutdown

• Check the Systems in this Group for fire alarms. The Group Fatal Fire 

Shutdown occurs only when the Group Fire Alarm configuration setting 
(Path: Main > Setup > Group Config > Grp Fire Alrm) is On. While the 
fire alarm is active, the Group will remain shut down.

Group Fatal Smoke Shutdown

• Check the Systems in this Group for smoke alarms. The Group Fatal Smoke 

Shutdown occurs only when the Group Smoke Alarm configuration setting 
(Path: Main > Setup > Group Config > Grp Smoke Alrm) is On. While 
the smoke alarm is active, the Group will remain shut down.

Heater Requires Maintenance

• Verify the operation of the heater and perform preventive maintenance.
• Reset the maintenance alarm on the display interface for the heater.

Humidifier Current High

• Verify that the proper voltage is applied to the humidifier cylinder.
• Confirm that the line voltage connections to the cylinder are secure and 

correct.

• Ensure that the humidifier water supply has not been conditioned. 

Conditioning can increase the water conductivity.

• Check the humidifier cylinder for mineral buildup that bridges the electrodes.
• Check the fill and drain valves for leaks.