CVHE-SB-32A 28
Problem 71: Extended surge
Corrective action:
1 Unit operation conditions resulting in surge, such as: high head, air in the unit, condenser
tube fouling, low water flow, low charge and condenser water temperature vs. design. Unit
operation conditions is the most likely cause.
2 Replace Starter module. Faulty CT input.
3 Stepper motor and/or linkage.
4 Replace options module. Bad head relief request relay.
5 Guide vane linkage.
6 Replace Starter module with more sensitive one (X-13650453-17 or greater).
Problem 72: Pressure Transducer shift in calibration. Diagnostics will be sensor calibration
related such as sensor failure or oil pressure sensor calibration.
Corrective Action:
1 Wired incorrectly. Check diagram.
2 Corrosion on transducer contacts.
3 Bad transducer.
4 Disregard diagnostics when the unit is a deep vacuum prior to charging.
Problem 73: Rapid Time of Day Scrolling or Date jumps back one day.
Corrective Action:
1 Problem one is rapid time of day and year scrolling. The problem is in the CLD software when
we reach December 29, 30 and 31. Fix: Replace the CLD (Local Clear Language Display)
with a X-13650448-03 or newer. To stop the scrolling, press Enter to get a valid date and set
before or after Dec. 29/30.
2 Problem two is when the date jumps back one day. The date of January 4,1995 is set and it
jumps back to January 3, 1995. This is because 1996 is a leap year and the problem only
exists on the year prior to leap year. Replace the CLD with a X-13650448-03 or newer.
Problem 74: Unit did not Transition diagnostics.
Corrective Action:
1 Do a Starter Dry Run Test.
2 Check for 24 VAC input to all modules.
3 Check for 24 VDC and 5VDC on the Starter module.
4 Check all wiring and connections.
5 Check for 120 VAC on the Starter module J4-1 and 2. J4 is an OPTO input circuit that
recognizes transition complete. If there is no signal on J4, the unit will not transition.
6 Replace bad Starter module.
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