Seresco CLASSIC NE-002, Operation And Maintenance Manual

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F – Interface and Communication
F ‐
2
Alarms
If the dehumidifier control system detects abnormal or unsafe for further operation situation, it issues A larm
(notification of such situation accompanied by respective component or entire dehumidifier stoppage and/or
lockout) or Alert (notification of minor abnormal situation without any devices’ stoppage or lockout).
All alarms and alerts are recorded and can be viewed/cleared via the Touch Display OP:

Viewed: to facilitate troubleshooting and addressing abnormal situation

Cleared: to unlock stopped device or entire dehumidifier and allow for further operation
The table F.1 below lists the basic alarms with their descriptions and recommended initial troubleshooting.
Table F.1. Most Common Alarms/Alerts
Alarm Alarm Description Check
No Air No air flow (air flow switch fault – if air flow
switch is installed )
Check main blower operation and air flow
switch
Blower OL Main Blower overload/safety fault Check main blower operation and its LED
light blinking pattern.
Fire Fire/smoke detector fault – if detector is installed
externally and connected to control board
Check external fire/smoke
detector/system
Freeze Supply Air temperature is lower than Freezestat
Setting (default: 45 F)
Check SA temperature readout, space
heating system operation
Filter Alert, indicating that filter change timer has
lapsed – if timer is activated
Clear the Filter alarm and cancel filter
scheduler if not in use.
VM Voltage Monitor fault – power supply (phasing,
voltage etc.) is outside of pre ‐ set limits
Check Voltage Monitor info/status,
incoming power (voltage)
Compressor:
‐ HP1 ‐ ( X )
‐ LP1 ‐ ( X )
‐ SupHeat1
‐ DisTemp1
Various compressor ‐ related alarms, relevant to:
‐ Compressor high/discharge pressure;
‐ Compressor low/suction pressure;
‐ Compressor superheat/suction temperature;
Check respective compressor ‐ related data
(pressure and temperature readouts),
refrigerant level in the receiver’s sight
glasses, cleanliness of air ‐ side coils and air
filters.
Pool Water:
Water( X )1,
Wtr( X )1
Various compressor pool water heating ‐ related
alarms indicating inadequate (too low/too high)
pool water flow and/or pool water temperature.
Unless the alarm occurred due to a known
water flow interruption (backwash, etc.),
check the pool water flow (pump, filters,
valves) and pool water temperatures.
HPRelief Alert , indicating that additional condensing
capacity is engaged (pool water heat exchanger
etc.) to prevent compressor high pressure from
rising too high.
No action required unless it’s
accompanied by other (compressor ‐
related) alarm or faulty situation.

Note that proper and regular maintenance (example: keeping air filters and air ‐ side coils clean) should
reduce the chances of abnormal operations, dehumidifier alarm ‐ related stoppages and downtime.
For more details regarding alarms and alerts, refer to the Alarms Description information (available via Help
feature in Touch Display OP); contact factory if needed.
CAUTION!
We recommend you have a qualified professional investigate and remedy all reoccurring
alarm ‐ related stoppages and lock ‐ outs. Continuous dehumidifier restarting (clearing alarms) without addressing
actual issues may result in equipment malfunction, premature wear, and failure.