NuAire LabGard ES NU-543-300S, Руководство по эксплуатации и обслуживанию

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OM0239 Page 56 of 72
April 2021
8.0 Error Messages, Troubleshooting, Option-Diagnostics and Airflow Sensor Performance Verification
Audible alarms and error messages occur for a variety of reasons. Whenever an alarm condition has been present for a
period of at least 10 seconds, the audible alarm/error message will be presented and stay on until the error is cleared. The
audible alarm will be on for 30 seconds upon initial alarm condition, then 2 seconds every 5 seconds. When presented with
an error message, please perform the following:
Step 1: NOTE ALL ERROR MESSAGES.
Error message will appear in message area on the display with the red alarm LED oval.
Step 2: VERIFY ERROR MESSAGES.
Error messages can be verified by clearing the error function by either turning the blower or the cabinet on
and off.
Step 3: MONITOR RE-OCCURRENCE OF ERROR MESSAGES.
If re-occurrence of the error message is immediate or daily, use the following guide to correct the situation.
8.1 Error Message Troubleshooting Guide
Error Message Indicator Correction

Window Alarm
(Window High)
Sliding window is above standard working height
or micro switch is not operating properly. Verify standard working height and window micro
switch operation.

Window Alarm
(Window Low)
Window Closed
Sliding window is below standard working height
or micro switch is not operating properly.
Indicates the window is in the full down position
Verify standard working height and window micro
switch operation.

Velocity Alarm Airflow went above or below alarm setpoints.
Check orientation of exhaust sensor shroud
Check motor PWM signal.
Recertify cabinet to proper airflow setpoints.
Inflow airflow went above high alarm setpoint.
Cabinet fluorescent lights
won’t t urn on
Blue LED above light key indicates the lamp
should be on.
Check light fuse on main control board.
Check lamps.
Check voltage coming out of main control board to
light ballasts.
Cabinet blower won't
turn on.
Green LED above blower key indicates the blower
should be on.
Airflow Alarm.
Check blower fuse on main control board.
Check AC voltage coming out of main control board.
Check wiring to blower.
Check blower motor.
Check DC motor PWM signal on main control board.
Power on reset Indicates a power interruption has occurred. Press any key to clear message.
Cabinet outlets won't
turn on. Blue LED above outlet key indicates the outlets
should be on. Check outlet fuse located on main control board.
Check voltage coming out of main control board.
Cabinet ultraviolet light
won't turn on. Yellow LED above UV light key indicates the UV
lamp should be on.
Check sliding window position- should be fully closed.
Check blower/lights fuse on main control board.
Check voltage coming out of the main control board
to ultraviolet light ballast.
Check light starters, if present.
Check ballast.
Blower or light fuse
continues to blow after
replacement.
N/A
Check for short on output of fuse.
Isolate output of fuse by disconnecting control center
connectors, light circuit, AC or DC blower circuit, etc.
to isolate the short.
Replace UV Light! Indicates that the UV light needs replacement Replace UV light and clear UV run time clock.
Nite Care On
Indicates that the Nite Care is activated,
preventing the usage of the cabinet.
N/A
Velocity sensor
comm error Indicates a digital communications error from the
main control board to the airflow sensors. Check connectors and wires from main control board
to the airflow sensors.
Velocity sensor error Indicates an error signal generated by the sensor.
Check airflow probe connector on airflow sensor bd.
Replace airflow sensor if required.
New firmware loaded
Message acknowledges new firmware was loaded
into microprocessor
N/A
Blower rpm failure
blinking Red Blower LED Indicates that the motor rpm signal has been
interrupted
Check connectors and wires from main control board
to the motor
Replace motor if required