A – Power supply phases are in reverse order

B – Faulty phase protector relay

A – Randomly switch any 2 phases other than ground

B – Replace phase protector relay

A – Over current

B – Faulty pump contactor or overload relay

C – Faulty water pump

A – Reset overload relay and adjust Amps if necessary

B – Replace faulty part

C – Replace water pump

A – Over current

B – Faulty compressor contactor or overload relay

C – Faulty compressor

D – Dirty condenser

E – Chiller size too small for the application

A – Reset overload relay and adjust Amps if necessary

B – Replace faulty part

C – Replace compressor

D – Clean condenser coils

“IF” freon high pressure gauge exceeds 2.5 Mpa. check the following;

A – Dirty condenser

B – Faulty condenser fan

C – Working environment temperature too high

D – Faulty temperature controller

E – Temperature setting too low

F – Chiller load capacity exceeded

“IF” freon pressure does not reach 2.5 Mpa & high pressure alarm error

G – Low voltage supply. below 195 VAC or 460 VAC

H – Loose electrical connection

I – Faulty high pressure switch

J – Electrical relay KA2, bad contact

A – Clean condenser coils

B – Replace fan

C – Relocate chiller to a larger working area. Chiller needs 3 feet clearance around

D – Check for temperature controller Accuracy

E – Temperature setting over 6 C (42 F)

F – Decrease load or use a bigger chiller

G – Minimum 195V for 3Ph 220V chillers Minimum 460V for 3Ph 480V

H – Check for loose or broken electric wires

I – Replace faulty part

J – Replace relay

A – Low refrigerant

B – Low water flow

C – Faulty low pressure switch or low pressure relay KA1

A – Find and repair refrigerant leak and refill refrigerant (refer to table below for refrigerant requirements)

B – Check water lines, Clear water line blockage, check water pump

C – Replace faulty part