Code
Description
Corrective Action
85
Compressor Current Out-of-Range
• Check for low supply power voltage.
(Check or Shutdown Alarm)
• Check the compressor current draw with a digital
• Indicates compressor motor has failed to
multimeter. Place unit in Full Cool mode using
start.
“REFRG FC HI” in the Refrigeration Test submenu.
Current draw of the compressor only should be 7 to
11 amperes at 480V. Current draw on each leg
should be within 0.3 amperes of each other.
• Visually inspect compressor motor contactor.
• If compressor contactor does not energize, check
output module and related circuits by using “REFRG
FC HI” in the Refrigeration Test submenu to place
the unit in Cool. Then confirm that output LED
AC11 is ON.
• If current draw on each leg is not within 0.3 amperes
of each other during compressor current draw test,
check the current transformer. Turn unit OFF and
disconnect power supply. Disconnect plug on cur-
rent transformer and check the resistance of each
primary winding. Resistance for each winding
should be 43 +/- 0.5 ohms.
• Visually inspect the refrigeration system for condi-
tions that could cause excessively high pressures.
• Check the compressor for proper operation.
CSR-20 & CSR-40, September 1999
µ
P-D Controller
Alarm Codes, Descriptions and Corrective Actions
4-65
