IOM 1207-6 • TRAILBLAZER
®
MODEL AGZ CHILLERS
136 www.DaikinApplied.com
Troubleshooting Chart
Troubleshooting Chart
PROBLEM
POSSIBLE CAUSES
POSSIBLE CORRECTIVE STEPS
Compressor Will
Not Run
1. Main or compressor disconnect switch open.
1. Close switch.
2. Fuse blown. circuit breakers open
2. Check electrical circuits and motor windings for shorts or
grounds. Investigate for possible overloading. Check for loose or
corroded connections. Replace fuse or reset breakers after fault
cause is corrected.
3. Thermal overloads tripped
3. Overloads are auto-reset. Check voltages, cycle times and
mechanical operations. Allow time for auto-reset.
4. Defective contactor or coil.
4. Replace.
5. System shutdown by equipment protection devices
5. Determine type and cause of shutdown and correct it before
restarting equipment.
6. No cooling required
6. None. Wait until unit calls for cooling.
7. Liquid line solenoid will not open
7. Repair or replace solenoid. Check wiring.
8. Motor electrical trouble
8. Check motor for opens, shorts, or burnout.
9. Loose wiring
9. Check all wire junctions. Tighten all terminal screws.
Compressor Noisy
Or Vibrating
1. Low lift, inverted start
1. Control issues or condenser fan VFDs needed.
2. Compressor running in reverse
2. Check unit and compressor for correct phasing.
3. Improper piping or support on suction or discharge
3. Relocate, add, or remove hangers.
4. Worn compressor isolator bushing
4. Replace.
5. Compressor mechanical failure
5. Replace.
High Discharge
Pressure
1. Noncondensables in system
1. Extract noncondensables with approved procedures or
replace charge.
2. Circuit overcharged with refrigerant
2. Remove excess, check liquid subcooling.
3. Optional discharge shutoff valve not open
3. Open valve.
4. Condenser fan control wiring not correct
4. Correct wiring.
5. Fan not running
5. Check electrical circuit and fan motor.
6. Dirty condenser coil
6. Clean coil.
7. Air recirculation
7. Correct.
Low Suction
Pressure
1. Rapid load swings
1. Stabilize load.
2. Lack of refrigerant
2. Check for leaks, repair, add charge. Check liquid sight glass.
3. Fouled liquid line filter drier
3. Check pressure drop across filter drier. Replace.
4. Expansion valve malfunctioning
4. Repair or replace and adjust for proper superheat.
5. Condensing temperature too low
5. Check means for regulating condenser temperature.
6. Compressors not staging properly
6. See corrective steps - Compressor Staging Intervals Too Low.
7. Insufficient water flow
7. Correct flow.
8. Excess or wrong oil used
8. Recover or change oil
9. Evaporator dirty
9. Back flush or clean chemically.
Содержание Trailblazer AGZ030E-070E
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