Advertisement
If any malfunction occurrs, immediately switch off the power supply to the unit, and contact a local dealer if necessary. Some
simple trouble shooting tips are given below.
SYMTOMS
1. Compressor does
not start.
2. Fan does not work.
3. Air cooled mini
chiller does work,
but
cools
unsuffuciently.
4. PCB display 'CO'.
5. PCB display 'PO'.
6. PCB display 'FL'.
7. PCB, display 'HP'.
8. PCB display 'LP'.
9. PCB display 'E3'.
TROUBLE SHOOTING
POSSIBLE CAUSES
* No power supply.
* Fuses blown or automatic circuit break-
down open.
* Thermal relay tripped.
* Defective contactor or coil.
* Unit is stopped because safety device has
tripped.
* Loose wires.
* Compressor faulty.
* No power supply.
* Fan motor faulty.
* Thermostat setting too high.
* Condenser coil dirty.
* Obstacle blocking air inlet or outlet of the
unit.
* Insufficient refrigerant in the system.
* Improper water flow rate.
* Water source contains contamination.
* Compressor thermal relay tripped.
* Terminal loose.
* Pump thermal relay tripped.
* Terminal loose.
* Flow switch connection loose.
* Wrong terminal in flow switch.
* Water volume not enough.
* Flow switch blade too short or too long.
* Discharged pressure too high
* Overcharge.
* Coil dirty.
* Condenser Fan does not work
* Expansion valve stuck in open position
* Suction pressure too low
* Undercharge
* Gas Leak
* Water flow rate too low
* Antifreeze protection activated.
* Water flow rate too low
* Bubble in the heat exchanger
* Check power supply.
* Look for short circuit or grounded wires in
motor windings. Replace fuses and reset cir-
cuit breakers when the fault has been cor-
rected. Check tightness and soundness of all
electrical connections.
* Reset the thermal relay and carefully monitor
units operation when it is restarted.
* Repair or replace.
* Determine the type of safety shut down and
correct the default before the unit is restarted.
* Check wire connections and tighten terminal
screws.
* Contact local dealer.
* Check power supply.
* Contact local dealer.
* Reset thermostat.
* Contact local dealer.
* Remove the obstacle.
* Contact local dealer.
* Contact local dealer.
* Contact local dealer.
* Reset the thermal relay and carefully monitor
units operation when it is restarted.
* Tighten terminal screws.
* Reset the thermal relay and carefully monitor
units operation when it is restarted.
* Tighten terminal screws.
* Tighten terminal screws.
* Change the terminal.
* Add water into the system.
* Replace flow switch.
* Reset the pressure switch and observe the units
operation when it is restarted.
* Contact local dealer.
* Clean the coil with chemical detergent.
* Contact local dealer.
* Replace it.
* Reset the pressure switch and observe the units
operation when it is restarted.
* Contact local dealer.
* Contact local dealer.
* Adjust the flow rate.
* Check the temperature setting.
* Adjust the flow rate.
* Increase the water volume.
1-9
REMEDIAL ACTION
Advertisement
