Daikin Trailblazer AGZ030E-070E Installation, Operation And Maintenance Manual page 137

PROBLEM
1. Defective capacity control
Compressor Will Not
2. Faulty sensor or wiring
Stage Up
3. Stages not set for application
1. Control band not set properly
2. Faulty water temperature sensor
3. Insufficient water flow
Compressor Staging
4. Rapid temperature or flow swings
Intervals Too Short
5. Oversized equipment
6. Chiller enabled with no load
7. Light loads
1. Oil hang-up in remote piping
2. Low oil level
3. Loose fitting on oil line
4. Level too high with compressor operating
5. Insufficient water flow - Level too high
Compressor Oil
Level Too High Or 6. Excessive liquid in crankcase - Level too high
Too Low
7. Short cycling
8. HGBP valve oversize or improperly set-up
9. Expansion valve operation or selection
10. Compressor mechanical issues
11. Wrong oil for application
1. Voltage imbalance or out of range
Motor Overload
2. Defective or grounded wiring in motor
Relays or Circuit
3. Loose power wiring or burnt contactors
Breakers Open
4. High condenser temperature
1. Operating beyond design conditions
2. Discharge valve not open
Compressor Thermal
3. Short cycling
Protection Switch
4. Voltage range or imbalance
Open
5. High superheat
6. Compressor mechanical failure
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POSSIBLE CAUSES
137
POSSIBLE CORRECTIVE STEPS
1. Replace.
2. Replace.
3. Adjust controller setting for application.
1. Adjust controller settings for application.
2. Replace.
3. Correct flow.
4. Stabilize load.
5. Evaluate equipment selection
6. Evaluate BAS sequence and settings
7. Evaluate need for HGBP or thermal inertia
1. Review refrigerant piping and correct.
2. Verify superheat, add oil.
3. Repair.
4. Confirm correct superheat, remove oil.
5. Correct flow, verify superheat.
6. Check crankcase heater. Check liquid line solenoid valve operation.
7. Stabilize load or correct control settings for application.
8. replace or adjust HGBP valve
9. Confirm superheat at minimum and maximum load conditions
10. Replace compressor
11. Verify
1. Correct power supply.
2. Replace compressor.
3. Check all connections and tighten, replace contactors.
4. See corrective steps for High Discharge Pressure.
1. Correct so conditions are within allowable limits.
2. Open valve.
3. Stabilize load or correct control settings for application
4. Check and correct.
5. Adjust to correct superheat.
6. Replace compressor.
IOM 1207-6 • TRAILBLAZER
Troubleshooting Chart
MODEL AGZ CHILLERS
®