1-7
1. Compressor does
not start.
2. Fan does not work.
3. Unit does work,
but insufficient
cooling.
4. Flow Switch Error
MAINTENANCE
• Maintenance service of the mini chiller must be carried out by qualified persons.
• The unit is easily accessible for servicing and maintenance by accessing the front panel of the unit (for electrical compo-
nents) and the panel door (for refrigerant and water circuit).
• For consistent performance it is recommended that a routine maintenance of cleaning the coil surfaces to conducted
because of dusty surroundings.
• It is also recommended that regular checks on the water strainer to be conducted. Change the water strainer if it is dirty or
choked.
!!
!!
! CAUTION
• Do not attempt to do any service or maintenance when the unit is operating.
• Do not spray any chemical agents or flammable agents to the unit. It could cause fire or explosion.
TROUBLESHOOTING
When any malfunction is occurred, immediately switch off the power supply to the unit, and contact the local dealer, if
necessary. Some simple troubleshooting tips are given below :
SYMPTOMS POSSIBLE CAUSES REMEDIAL ACTION
• No power supply.
• Fuses blown or automatic circuit break-
down open.
• 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 in the system is contaminated.
• No water in the system.
• Low water level in the system.
• Check power supply.
• Look for short circuit or grounded wires in
motor windings. Replace fuses and reset
circuit breakers when the fault has been
corrected. Check tightness and soundness of
all electrical connections.
• 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.
• Check water supply.
• Check water supply.
!!
!!
! CAUTION
• Troubleshooting must be performed by qualified personnel.
1. A 3V DC battery is supplied with the LCD. It is used to ensure that the LCD displays real time once the timer is set.
2. The LCD is wired to the main board via CN8 connection. (This is factory installed)
If the wiring between the LCD and PCB must be longer, an alternative is used. Use a 4-core wire of the desired length and
connect this wire between the terminal block CN2 on the LCD to the terminal block CN5 on the PCB. Ensure that the
correct wire terminals are connected.
3. Networking between chillers can be carried out. Connect the wire as shown
Factory installed
Alternative wiring between LCD panel and PCB
For networking only
Main Board unit 00
A
A
A
B
B
B
12V
12V
12V
GND
GND
GND
JP13
LCD Panel
CN8
CN2
CN5
PCB unit 01