Chiller Basic Troubleshooting

Report
Air and Water Chiller Basic
Class
BY PHIL RODIN
Things to check when chiller is not running or is in
alarm
Alarm showing water flow, pumps both chilled and condenser
water types of flow switches
Alarm showing water flow, pumps both chilled and
condenser water types of flow switches
Alarm showing water flow, pumps both chilled and
condenser water types of paddle switches
Alarm showing water flow, pumps both chilled and condenser
water types of electronic flow switches
 Electronic flow
switches have probes
Alarm Conditions
 High Pressure
 1. Low water flow
 2. Cooling tower
 3. Strainers (locations?)
 4. Valves (electric or manual types)
 5. The entering and leaving water temp.
 6. Approach temp
Alarm conditions
Alarm conditions
Alarm conditions
Alarm conditions
Chilled water flow
 1. Pumps
 2. Strainers
 3. Valves (manual and electric)
 4. Flow switches
 5. Water temp in and out
 6. Approach temp
Alarm conditions
Chilled water flow (cont.)
PRV
What is the oil temperature?
 1. Feel the tank or read with inferred.
 2. Check control panel
 3. Check for power
 4. Think out of the box, How can we heat this?
What is the oil temperature?
(cont.)
What is the oil temperature?
(cont.)
Pressure & Temp. Gauges
(electronic)
Pressure & Temp. Gauges
(fluid type)
Chiller Surging
 ASK YOURSELF?????
 1. Is it a high or low end surge?
 2. Are your amps going up or down?
 3. The sound?


a. Is it an elephant
b. Is it a grumble
Chiller Surging
(High & Low Surging)
 High Surge on Low Pressure Machines
 1. Water temp. in and out.
 2. Approach
 3. Cooling Tower
 4. Purge
 5. Refrigerant levels
Chiller Surging
(High & Low Surging)
Chiller Surging
(High & Low Surging)
Chiller Surging
(High & Low Surging)
Chiller Surging
(High & Low Surging)
Chiller Surging
(capacity control)
Chiller Capacity Control
Low End Surge
 1. Water temp. In and out
 2. Approach Temp.
 3. Water pressure
 4. Refrigerant levels
Low End Surge
Low End Surge
Transducers & Sensors Types
Transducers & Sensors Types
Panel Codes
Carrier code 1111
2. York code 9675 aka YORK
3. Trane code ++--++ (different combinations)
1.
How’s the Chiller Running?
 Is the chiller running in local?
 Is the chiller running in EMS?
 Are the pumps running?
 Are the valves open?
 Hand –off Auto (Think before going to hand)
Cavitation of Pumps
 1. Strainers
 2. Water pressures
 3. Couplings
 4. Valves
 5. Primary or Secondary Loop
Questions
(There is no such thing as a dumb question)
?

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