Compressors
1. Check oil level
2. Check for oil leaks
3. Check compressor mounts (bushings)
4. Cap tubes (not rubbing)
5. Check/Re-torque wire connections (inside compressor box)
6. Compressor operation (vibration/noise)
7. Check crank-case heater fuses/operation (if equipped)
8. Check for refrigerant leaks
9. Suction pressure Circuit #1 Circuit #2
10. Discharge Pressure Circuit #1 Circuit #2
11. Superheat Circuit #1 Circuit #2
12. Low-pressure switch cut out Circuit #1 Circuit #2
13. Low pressure cut in Circuit #1 Circuit #2
14. High pressure cut out Circuit #1 Circuit #2
15. Amp draw
Circuit #1A L1 L2 L3
Circuit #1B L1 L2 L3
Circuit #2A L1 L2 L3
Circuit #2B L1 L2 L3
Condenser
1. Coil clean
2. Fans free of debris
3. Fans securely mounted
4. Motor bearings in good condition
5. Check all refrigerant lines for vibration isolation. Support as necessary
6. Check for refrigerant leaks
7. Check surge-protection device (if installed) status-indicator lights
8. Check/Re-torque wire connections
9. Check contactors for pitting (replace if pitted)
10. Verify operation sequence/set points
11. Charge verification:
a. Outdoor Ambient Temperature__________
b. Subcooling__________
c. Indoor-unit Return-air Temperature__________
d. Sight-glass level (if Lee-Temp or pumped refrigerant)_________
12. Motor amp draw
#1 L1 L2 L3
#2 L1 L2 L3
#3 L1 L2 L3
#4 L1 L2 L3
#5 L1 L2 L3
#6 L1 L2 L3
#7 L1 L2 L3
#8 L1 L2 L3
Vertiv | Liebert® DSE500™ Installer/User Guide
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