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FOLLOWING THE BELOW PPM CHECKS & FINDINGS, CONTRACTOR IS TO REPORT DERIVED

FINDINGS & IMPLEMENT CORRECTIVEACTIONS AS PART OF EACH VISIT, :

DESCRIPTION OF PPM CHECK VISIT 1 # 2 # 3 # 4

POWER

CHECK MAIN POWER TO EQUIPMENT

PERFORM VOLTAGE IMBALANCE CALCULATION (see below)

PERFORM MEGGAR TEST ON ALL COMPRESSOR MOTORS

CHECK CONTACTORS CONTACT POINT AND REPLACE WHERE NECESSARY

CHECK MOTOR AMPERAGE AS AGAINST FLA AND VOLTAGE

CHECK STARTER/ WIRING CONNECTIONS

CHECK STARTER OPERATION

CONTOLS

CHECK CONTROL POWER

CHECK MICROPROCESSOR AND RECORD DATA

CHECK CHILLER SAFETY/ OPERATING CONTROLS

Thermistors and pressure transducers functioning in conjunction with the control system to provide the unit

with the following protections- Loss of refrigerant charge protection, Low water flow detection, Lowchilled water temperature protection, Low and high superheat protection, Low oil protection for each

compressor, Low control voltage to unit protection, Ground current protection for each compressor,Compressors protections against Pressure Overload & Electrical overload. Diagnostic display for all alarms

and set points

REF

RIGERANTCIRCUIT

CHECK REFRIGERANT CHARGE by superheat and sub-cooling temperatures

CHECK EXPANSION VALVE FUNTIONING & STATUS

LOG EVAPORATOR REFRIGERANT TEMP

EVAPORATOR REFRIGERANT APPROACH TEMP

LOG EVAPORATOR PRESSURE

CHECK REFRIGERANT LIQUID GLASS (IF CLEAR )

CHECK FOR ANY LEAK IN REFRIGERANT SYSTEM AND OIL SIDE

LOG CONDENSER REFRIGERANT TEMP

LOG CONDENSER PRESSURE

LOG CONDENSER SUBCOOLER PRESSURE

CHECK FOR RESTRICTION ACROSS DRIER CORES & REPLACE WHERE REQUIRED

CONDENSER LOG ENTERING CONDENSER AIR TEMPERATURE (ON-COIL AIR TEMP)

LOG LEAVING CONDENSER AIR TEMPERATURE (OFF-COIL AIR TEMP)

CHECK CONDENSER FANS FOR CLEARANCE AND ALIGNMENT, BLADES STATUS

LUBRICATE FAN MOTOR BEARINGS ( IF BEARINGS ARE OPEN TYPE)

OIL

LOG OIL LEVEL

LOG OIL PRESSURE

PERFORM OIL ANALYSIS

CHILLEDWATER

LOG CHW FLOW DELTA P

LOG CHW PUMP DELTA P

LOG CHW TEMP

LOG LEAVING CHW TEMPERATURE

LOG ENTERING CHW TEMPERATURE

PERFORM CHW ANALYSIS AND ADVISE RECOMMENDATIONS

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CALIBRATE CHW FLOW SWITCH ( IF NOT ELECTRNIC TYPE )

INSPECT CHW PIPE LINE/ CLEAN STRAINERS

DETECT AND REPORT ANY SIGNS OF CORROSION

CHECK PAINTWORK AND APPLY NEW IF NECESSARY

GENER

AL

REVIEW AND EVALUATE LOG READINGS

CHECK GENERAL OPERATION

The above PPM Checks shall specifically & categorically comprise the below details:

1. Submit the details of No of Compressors failed, complete with Mean Time to Repair & MeanTime between Failures.

2. Status of Filter/Drier core replacement

3. Status of oil test & replacement based on findings4. Status of Expansion valve functioning

5. Additional Refrigerant topping up where identified/applicable

6. Purging where identified/applicable

7.

Based on the previous track history of repeated Compressors failure frequency, performEddy current testing to (once in five years) to detect tube degradation such as pits,

cracks, or wall loss over time & subsequent moisture entry into compressors.8. Submit Maintenance program Accomplished Vs Planned

9. Prevention of Motor overheat by means of internal temperature sensors

10.Prevention of Motor overload

11.Condenser fan & motor replacements status12.Thermistors & Transducers functioning & set-points verification (details are to be

submitted)

13.Assign qualified Maintenance personnel (approval is to be obtained from AccountManager) to identify and initiate PPM works based on the findings from the equipment

history & current status and to carry out Verification & Validation of Maintenance worksis to be carried out.

14.Resource details (Planned Vs Actual site status) are to be submitted15.Method statements are to be submitted