CRR-20 & CRR-40, September 1999
µ
P-D Controller
Alarm Codes, Descriptions and Corrective Actions
4-63
Code
Description
Corrective Action
82
Compressor Over Temperature
• Check operation of the liquid injection valve using.
(Check Alarm)
“LIV” in the Controller Test submenu.
• Indicates compressor temperature sensor has
• Check refrigeration system for plugged filter drier,
detected a high compressor temperature
plugged in-line filter, low or high side obstruc-
condition and the condition was not corrected
tions or closed liquid line service valve.
after 5 minutes (fault condition prevented unit
restart).
NOTE: Controller display shows “PAUSE
ALM82” every 10 seconds while the
condenser fan operates to resolve the
problem during unit shutdown.
• Controller also generates alarm if high
compressor temperature/restart cycle recurs
3 times within 30 minutes.
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.
• Check the refrigeration system for excessively high
pressures.
• Check the compressor for proper operation.
Содержание CRR-20
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