Schreiber-chillers Old 4 ton MRI Manuel d'utilisateur télécharger pdf (Page 30)

TROUBLE SHOOTING - PART I

SYMPTOM DIAGNOSIS REMEDY

Compressor won't run

Check

Power supply

Electrical circuit

Check

Line load voltage

Temperature control

Compressor overload

Low pressure switch

High pressure switch

Manual switch

Compressor

All control circuit

Correct circuit breaker

Repair or replace bad circuit

Correct voltage condition

Repair or replace

Replace

Repair or replace

Replace

Repair

Compressor runs

No refrigeration

Refrigerant leak

Stuck expansion valve

Repair leak and recharge

Replace expansion valve

High pressure trips

Condenser motor

Air over condenser restricted

Service panel not in place

Repair or replace motor

Clean condenser

Install service panel

Low pressure switch

Cutting out

Defective expansion

Refrigerant leak

Replace expansion valve

Repair leak

Temperature too high

Dial thermometer

Temperature controller

Water pump off

Re-adjust or replace

Replace

Check controls circuit

Temperature too cold

Temperature controller

Dial thermometer

Water pump

Repair or replace

Out of adjustment

Not circulating water

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Schreiber-chillers Old 4 ton MRI Manuel d'utilisateur Page 30

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