Page 120
– Bulletin 100-50-9.1
RED
denotes required control configuration to enable alarm and/or control response.
Alarm
Description
Cause
Control Response
Self
Clearing
U
No Suction Pressure Transducer
detected
Single Evaporator
Superheat or Pressure Control
selected.
Pressure Transducer(s) not connected,
miswired or faulty.
Superheat Control selected.
EEV closes to prevent possible flood
back.
EEPR Pressure control selected.
1.
Single case in line-up:
EEPR moves
to calculated “fault” position.
2.
Multiple cases with pressure
transducers in line-up. Pressure
Sharing Enabled:
Average pressure
value from remaining available
pressure transducers is used for
control.
Yes
d
No Control Temperature sensor
detected (Discharge or Return Air)
S3C Case Control must have at least
one control temperature input.
Sensor not connected, miswired or
shorted.
EEPR Temperature control selected.
1.
Single case in line-up:
EEPR moves
to calculated “fault” position.
2.
Multiple cases or evaporators with
Discharge Air sensors available in
line-up:
Average temperature value
from remaining available sensors is
used for control.
Yes
No Dew Point sensor detected
Anti-sweat control using dew point
enabled.
Sensor not connected, miswired or
shorted.
Anti-sweat output reverts to 100% on
Yes
No Case Surface Temperature sensor
detected
Anti-sweat control using dew point
enabled.
Sensor not connected, miswired or
shorted.
Anti-sweat output reverts to 100% on
Yes
oU
No Coil Outlet Temperature sensor
detected
Note:
Can be Coil Outlet sensor on Valve
Module in multiple evaporator
applications.
EEV (superheat control) selected.
Sensor not connected, miswired or
shorted.
EEV (superheat control) selected.
EEV closes to prevent possible flood
back to compressor(s)
Yes
d
No Defrost Termination Temperature
sensor detected
Note:
Can be Defrost Termination sensor on
Valve Module in multiple evaporator
applications.
Not configured for defrost termination
using Discharge Air Temperature.
Sensor not connected, miswired or
shorted.
Defrost cycle terminates on fail-safe
time.
Yes
d
No Discharge Air sensor detected for
defrost termination.
Note:
Can be Discharge Air sensor on
Valve Module in multiple evaporator
applications.
Air Defrost and Discharge Air selected
for defrost termination temperature.
Sensor not connected, miswired or
shorted.
Defrost cycle terminates on fail-safe
time.
Yes
og
Clogged Drain
Condensate level in case exceeds
selected threshold for period
exceeding selected Clogged Drain
alarm delay.
Yes
Fan Fault
Fan(s) failed to start or stopped or
stalled (ECM) during operation
No
d
Defrost Heater Fault
Electric Defrost selected and Defrost
Heater CT installed.
Defrost Heater failed to energize during
defrost
Yes
d
Defrost Heater energized during
cooling
Electric Defrost selected and Defrost
Heater CT installed.
Defrost Heater contactor failed ON
Yes
Service Mode alarm
Time control is in Service Mode
exceeds selected Service Alarm Delay
Time
No
EEPR Open Load
EEPR configured.
EEPR not connected, miswired or open
winding/connection.
Yes
