STULZ CyberRow Chilled Water Series Installation, Operation & Maintenance Manual
(
Dec.
, 2013)
4-19
grammed to activate the “User Confi gured” alarm relay contacts.
4.5.3.2 Non-Critical
Alarms
A
Non-Critical
alarm will activate the alarm screen with
which it is associated. These alarms are programmed to
activate the “Summary Fault” alarm and close the “Sum-
mary Fault" relay contacts without stopping unit operation.
Some examples of the factory programmed,
Non-Critical
alarms are:
•
High Temperature
•
Condensate Pan
•
Low Temperature
•
Water Detector
•
High Humidity
•
Change Filter
•
Low Humidity
•
Sensor Failure
•
CW Flow
•
Communication Failure
4.5.3.3 Critical Alarms
ALARM MESSAGE
DESCRIPTION OF ALARM CONDITION
High Temperature
Air temperature is above user defi ned alarm setpoint.
Low Temperature
Air temperature is below user defi ned alarm setpoint.
High Humidity
Humidity is above user defi ned alarm setpoint
Low Humidity
Humidity is below user defi ned alarm setpoint.
Sensor Failure
Sensor is disconnected or faulty. (The failed sensor is identifi ed.)
Communication Failure
External and/or internal communication lost (BMS or pLAN)
Condensate Pan
Water level in condensate pan is reaching an unsafe level.
Water
Water sensed by water leak detector
No Air Flow
(CRS-090 units)
Insuffi cient airfl ow as detected by air proving switch.
Fan Failure
(CRS-180 units)
Upper, Middle and/or Lower fan failure.
Change Filter
Filter replacement time interval elapsed; fi lter needs to be replaced.
Smoke/Fire
An alarm condition detected by the smoke detector or fi restat.
High Air Temp Alarm (Optional)
Air temperature is above alarm threshold (user confi gurable).
Low Air Temp Alarm (Optional)
Air temperature is below alarm threshold (user confi gurable).
Power Source A Lost
Power source A not detected (provided with dual power option).
Power Source B Lost
Power source B not detected (provided with dual power option).
No Flow (Water Temp Sensors)
No chilled water fl ow as detected by optional temperature sensors.
Water Temp High Alarm
Supply EWT temperature is above alarm threshold (optional).
Water Temp Low Alarm
Supply EWT temperature is below alarm threshold (optional).
No Flow (Flow Switch)
Insuffi cient fl ow of chilled water as detected by optional fl ow switch.
Critical
Alarms will coincide with automatic shut down of
the A/C unit(s) equipment as needed to prevent possible
system damage. The A/C unit(s) equipment will remain shut
down until the alarm condition(s) are no longer sensed and
the controller has been reset. Some examples of
Critical
alarms are:
•
No Air Flow
•
Off by Internal Alarm
(Air Proving Switch)
(Only for grouped systems)
•
Fire/Smoke
Detection
4.5.3.4
Alarm Screen Messages
