CSR-20 & CSR-40, September 1999
µP-D Controller Alarm Codes, Descriptions and Corrective Actions 4-49
Code Description Corrective Action
10 High Pressure Cutout • Check for a dirty or restricted condenser coil.
(Check Alarm)
• Check for correct condenser fan operation using
• Indicates the high pressure cutout switch “AMPS CFH” test in the Electrical Test submenu.
has opened and the condition was not
corrected after 5 minutes (fault condition • Check fuse F11 on the power module.
prevented unit restart).
• Continuity check heck high pressure cutout switch
NOTE: Controller display shows “PAUSE
circuit wiring using a high quality multimeter.
ALM10” every 10 seconds while condenser
fan operates to resolve the problem during NOTE: Do NOT use a test light or other
unit shutdown. instrument; or controller damage may result.
• Controller also generates alarm if high • Check for correct water cooled condenser operation
pressure cutout/restart cycle recurs 3 times (option).
within 30 minutes.
• Check for jumper on water pressure switch connec-
tors in sensor harness if unit is NOT equipped with a
water cooled condenser (option).
• Check for a defective high pressure cutout switch.
12 Temperature Out-of-Range High • Check for an open or defective door.
(Check Alarm)
• Check for proper setting of fresh air exchange.
• Indicates the control temperature has
exceeded the allowable temperature and • Perform a Full Pretrip Test to check unit operation.
time duration above the setpoint after
having been in-range.
13 Temperature Out-of-Range Low • Perform a Full Pretrip Test to check unit operation.
(Check Alarm) (Chill Loads ONLY)
• Indicates the control temperature has
exceeded the allowable temperature and
time duration below the setpoint after
having been in-range.
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