CHILLER FALUTS AND TROUBLE SHOOTING
1. High pressure Discharge?
2. Low pressure Discharge ?
High pressure Discharge
Fist step is what to Check in unit step by step
1. Flowing Build up of minerals on condenser tubes (water cooled chiller) Caused by bad water treatment?
2. Dirty Condenser ( Air cooled chiller )
3. Reduction of air flow ( Air cooled chiller )
4. Reduction of water flow in condenser ( water cooled chiller )
5.High return condenser water temperature ( water cooled )
6. Discharge shut of valve partially closed ( Both wanted/Air cooled chiller)
7. High ambient air temperature (Air cooled)
8. Over Charged with refrigerant?
9. Non Condensable in refrigerant loop
10. Faulty pressure switch
This 10 Steps To Checked The Unit So Now
How to solve this 10 problems ( what to do?
1.improve water treatment regime, clean condenser tubes
2. Clean surfaces of condenser tube and fins
3. Check for debris blocking air flow.
Check condenser fan are working
Check for high compressor discharge pressure .
Low sub cooling, High compressor discharge temperature
4. Check by pass valve position, condenser pump are working strainers arenite blocked
5. Check cooling tower fan is working
Check cooling tower by pass valve position
6. Check valve position and open if needed
7. Ambient air above condenser design capabilities
8. Check pressure temperature and sight glasses around system compare and remove excess
Check for high discharge temperature and pressure
9. Parge non condensable check high discharge temperature
pressure and high discharge pressure with normal super heat
10. Compare data logs, Swap sensor and test
This 10 steps u follow and then solve the unit problem
Now we go to Low pressure Discharge
How to check Low pressure Discharge there is 5 steps
1. Suction valve partially closed
2. Under charged with refrigerant
3. Low ambient air temperature (air-cooled)
4. Low suction pressure
5. Dirty or obstructed evaporator
Solve This How To Fix
1. Check valve position and open
2. Check Temperature, pressure and sight glasses
Check for leakes, repair and top up as required
Check low suction pressure, high suction super heat
Medium high discharge temperature
3. Ambient air below condenser design capabilities
4. Covered in next side
5. Check evaporator tubes, consider cleaning
check for low compressor discharge pressure and low super heat