Troubleshooting Guide
CN-IC1-09
Title
:
i-Controller REV.200 Alarms (Troubleshooting)
EXTERNAL
11
1-19MAY2021
High Suction Pressure Alarm
For a digital compressor, the high suction pressure alarm is generated when the suction pressure increases above 140psi
for 10-minutes when a compressor is enabled during dehumidification or 170psi in cooling mode. For a fixed compressor
the high suction pressure alarm is generated with the suction pressure increases above 160psi and reset when the pressure
decreases below 150psi. When a high suction pressure alarm is generated,
“
ALARM
” will be displayed next to “
High Suct
Press
” on the
Alarms
screen.
When dehumidification and cool mode are disabled, or if the suction pressure falls below the 130psi during
dehumidification or 160psi during cooling, the high suction alarm will automatically reset.
Has the alarm
cleared?
Yes
Contact Tech
Support
1-888-598-1198
No
Issue resolved
•
Check compressor and condenser
operation
•
Check the refrigerant level for
overcharge
•
Check condenser coil for
cleanliness
•
Check for airflow issues (including
dirty filter, dirty or clogged
evaporator coil etc.)
•
Check for non-condensables in
refrigerant
•
High ambient conditions may be
responsible for the high discharge
pressure
•
Check the suction pressure
transducer
s voltage output
against that of spec sheet
•
Verify the alarm input points on
the board or controller
•
Verify that program is set for the
correct scale and type of sensor
•
Check wiring and connections
High Suction
Pressure Alarm
present
Pressure above
the set point?
Yes
No
Check refrigerant pressure
(Validate controller reading)