Emerson E2 Installation And Operation Manual page 245

SYMPTOM
Compressor will not Operate
POSSIBLE PROBLEM
Compressor is not programmed
properly.
Compressor types are set up
incorrectly.
Compressor programmed with
incorrect rating.
Pressure setpoints are set up
incorrectly.
Board and point addresses are
incorrect.
SOLUTION
Verify that E2 was programmed
for correct number of compres-
sor stages. Highlight the General
tab (C1) in the Suction Group
Setup screen. Is the correct num-
ber of stages in the "Number of
Stages" field?
Make sure that compressor
stages were properly set up as
VS (variable speed), C (com-
pressor), or U (unloader).
Verify that compressors were
assigned the proper rating (HP/
AMP, or BTU).
Set proper pressure setpoints.
If you are controlling the rack
using suction pressure, enter the
pressure setpoint in the SUC
PRES SETPT field. If you are
controlling by temperature, enter
the temperature setpoint in the
CTRL TEMP SETPT field.
Note: Pressure setpoints are
located under the Setpoints tab
(C2) in the Suction Group Setup
screen.
Set proper board and point set-
tings for input, output, and com-
pressor outputs. Board and point
settings are located under the
Inputs tab (C4), Outputs tab
(C5), and Comp Outs tab (C7) in
the Suction Group Setup screen.
Appendix F: Troubleshooting
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F 3