Tr o u b l e s h o o t i n g ( c o n t i n u e d )
Problem Possible cause
Chiller shuts down due to a Low air flow across the condenser.
High Pressure switch alarm.
Solution
Check for dirty condenser fins. Clean as necessary. See Maintenance section entitled, Cleaning the
Fan not operating. | Reset High Pressure switch. See |
| Operation section entitled, Resetting the |
| High Pressure Safety Switch. |
High ambient temperature.
Insufficient clear space around unit.
Clogged air filter.
Check for loose fan blade or open/grounded motor winding.
Move the chiller to a lower ambient temperature location.
Increase clearance around the chiller.
Replace filter. See Maintenance section entitled, Cleaning the
Chiller shuts down due to a Low Pressure switch.
✐NOTE: The is a normal shutdown for other
alarm conditions when the chiller’s main power has been switch off.
Attempting to operate the chiller with process coolant below 45°F {7.2°C}.
Low refrigerant charge.
Poor heat transfer in the evaporator tank due to a high percentage of glycol to water.
Low flow through the evaporator due to glycol foaming.
Low flow through the evaporator.
Faulty pump motor.
Clogged pump strainer.
Increase temperature setpoint above 45°F {7.2°C}. See Operation section entitled, Starting the Chiller.
See Installation section entitled, Checking the Refrigerant Charge.
Reduce the glycol mixture of the process coolant. See Installation section entitled, Filling the Chiller.
Replace the process coolant. See Installation section entitled, Filling the Chiller.
See Maintenance section entitled, Cleaning the Brazed Plate Evaporator.
Contact Conair Service.
Clean or replace the strainer. See Maintenance section entitled, Cleaning the Pump Strainer.
Troubleshooting | 6 |
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Tr o u b l e s h o o t i n g l 6 - 7