Bard W48A2PQ, Инструкция по установке и обслуживанию

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Manual 2100-642
Page 58 of 82
TROUBLESHOOTING LC5000-100 CONTROLLER AND TEC-EYE ALARMS
The LC5000-100 controller is designed for continuous and dependable operation. In the event that a problem is
encountered with the A/C system, the system controller may be used to diagnose the cause. The system controller
will display alarms for the entire system; the TEC-EYE hand-held tool will only display alarms for an individual unit.
The controller signals an alarm condition when the red backlight LED is illuminated behind the alarm key. An alarm
indication is accompanied by a screen text message of the cause. Often the remedy is simple to determine by reading
the alarm message, i.e., “Dirty Filter” (replace filter). The following guidelines are included to assist in troubleshooting
the system due to operational or performance problems. If the problem can’t be resolved using the alarm screens and
these guidelines, contact the BARD Technical Service Department at 419.636.0439 for assistance.
Signal Description Possible Cause Component to Check Recommended Action
Device
Actions
Smoke/Fire
Alarm
The entire unit(s) stops
working. The alarm
resets automatically.
Fire/smoke detector is
triggered Check the external
fire/smoke detector Replace the external
fire/smoke detector
Indoor Blower:
Off
Compressor/
Condensor Fan:
Off
Heat: Off
Damper: Closed
Check if the
connection to the
corresonding input
is ok or if the PLC
controller board is
defective.
Check if the
connection is ok.
Reconnect the cable.
If the controller board
is defective, replace
it.
High
Temperature
Alarm
Alarm is reset
automatically. Occurs
when the current
indoor temperature is
greater than the 2nd
high temperature alarm
setpoint value. The
default is 95°F.
The cooling capacity
loss or heat load loss is
too great.
Check for leakages in
the refrigerant circuit.
Check if heat load
exceeds the design
range.
Remove the leakage.
Increase the cooling
capacity. Compressor/
Condensor Fan:
Off
Compressor circuit
failure.
Check if components
connected to the
compressor are ok.
Check if compressor
is ok. Check if the
electric connection
is ok.
Replace the defective
components. Replace
the compressor.
Reconnect the cables.
Indoor temperature
sensor failure. Check if the sensor is
shorted or has failed. Replace the indoor
temperature sensor.
Incorrect value set for
the high temperature
alarm.
Check if value is
correct.
Correct the value.
Low Temperature
Alarm
Alarm can be reset
automatically. Occurs
when the current
indoor temperature is
less than the indoor
temperature setpoint
value minus the
temperature alarm
offset. The default is
45°F.
Heating capacity loss.
Check if the heaters
are ok. Check for
leaks around the unit. If heaters have failed,
replace them. Seal
the leaks.
Indoor temperature
sensor failure.
Check for a short in
the sensor or if it has
failed.
Replace the indoor
temperature sensor.
Incorrect value set for
the high temperature
alarm.
Check if the value is
correct.
Correct the value.
TROUBLESHOOTING BARD-LINK
TM
CONTROLLER ALARMS