Cosmotec OR Series, Manual

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/34
rev 09.2017 - ©STULZ S.p.A. - all rights reserved
3.4 DISMANTLING AND DISPOSAL
To demolish a chiller, contact the collection centre.
PROBLEM POSSIBLE CAUSES SUGGESTED INTERVENTION
I
THE CHILLER DOES
NOT START
1 THERE ARE NO EXTERNAL SIGNALS
2 INCORRECT CONNECTION WITH EXTERNAL SIGNALS
3 THE ANTI-RECIRCULATION TIMER IS ON 1 CHECK FOR EXTERNAL SIGNALS
2 CHECK CONNECTION WITH EXTERNAL SIGNALS
3 WAIT 5 MINUTES
II
THE COMPRESSOR
DOES NOT START
1 DEFECTIVE COMPRESSOR
2 THE POWER CIRCUIT IS OPEN
3 THE COMPRESSOR PROTECTION IS OPEN 1 CHECK THE WINDER PHASES WITH THE TESTER IF
THEY ARE SHORT AND IF THE IMPEDANCE IS
CORRECT AND THEN REPAIR/REPLACE THE ENGINE
2 CHECK THE POWER CIRCUIT
3 CHECK THE COMPRESSOR'S WORK CONDITIONS
III
REPEATED
STARTING
AND
STOPPING
OF
THE
COMPRESSOR
1 DEFECTIVE COMPRESSOR
2 MINIMUM PRESSURE SWITCH INTERVENTION
3 DEFECTIVE COMPRESSOR CONTACTORS
4 INCORRECT THERMOSTAT CONFIGURATION
5 NO COOLANT 1 CHECK AND/OR REPLACE IT
2 SEE POINT V
3 CHECK AND/OR REPLACE IT
4
CHECK AND RESTORE THE ORIGINAL
CONFIGURATION 5 SEE POINT VII
IV
HIGH PRESSURE
SWITCH
INTERVENTION
1 DEFECTIVE PRESSURE SWITCH
2 AIR FILTER AND/OR BLOCKED CONDENSER
3 FAN(S) DO NOT WORK
4 BLOCKED COOLANT FILTER
5 EXCESSIVE COOLANT GAS LOAD 1 CHECK AND/OR REPLACE IT
2 CLEAN FILTER AND/OR CONDENSER
3 SEE POINT VI
4 CHECK IF THE LIQUID LIGHT INDICATES PLANT
HUMIDITY OR IF THERE ARE BUBBLES IN THE LIQUID
LIGHT
DURING OPERATION OPERATIONS AND
REPLACE THE GAS FILTER
5 REMOVE EXCESS COOLANT: IF THE CONDENSATION
PRESSURE IS TOO HIGH AND THERE ARE NO OTHER
PLANT PROBLEMS, be careful because zeotrope mixes
like R407c do not allow the circuit to be partially released.
V
MINIMUM
PRESSURE
SWITCH
INTERVENTION
1 DEFECTIVE COMPRESSOR
2 NO GAS COOLANT
3 TAPS PARTIALLY CLOSED ON THE LIQUID LINE
4 BLOCKED COOLANT FILTER
5 BLOCKED THERMOSTAT VALVE
6 MISSING THERMAL LOAD
7 INSUFFICIENT LEVEL OF LIQUID IN THE TANK 1 CHECK AND/OR REPLACE IT
2 SEE POINT VII
3 CHECK AND OPEN THE TAPS COMPLETELY
4 CHECK AND/OR REPLACE IT. SEE POINT IV
5 CHECK IF THE MACHINE IS NOT COOL AND IF THE
LOW PRESSURE SIDE HAS TOO LOW PRESSURE AND
REPLACE IT
6 CHECK IF THE FLUID CIRCULATES IN THE
EVAPORATOR
7 ADD LIQUID
VI
THE FAN(S) DO
NOT START
1 DEFECTIVE FAN CONTACTORS
2 THERMAL FAN(S) INTERVENTION
3 ENGINE OF DEFECTIVE FAN(S) 1 CHECK AND/OR REPLACE IT
2 CHECK FAN(S) ENGINE INSULATION
3 CHECK AND/OR REPLACE IT. SEE POINT II
VII
NO COOLANT
1 LOSS FROM THE CHILLER CIRCUIT 1 PRESSURE THE CIRCUIT AT ABOUT 10 BAR, LOOK
FOR LOSSES WITH A LEAK DETECTOR
UNLOAD, REPAIR, VACUUM AND RELOAD.
VIII
FROST
THERMOSTAT
1 BLOCKED THERMOSTAT VALVE
2 NO GAS COOLANT
1 CHECK AND/OR REPLACE IT
2 SEE POINT VII
IX
THE CHILLER
WORKS
CONTINUALLY
WITHOUT
ANY
STOPS
1 NO GAS COOLANT
2 INCORRECT THERMOSTAT CONFIGURATION
3 EXCESSIVE THERMAL LOAD 1 SEE POINT VII
2
CHECK AND RESTORE THE ORIGINAL
CONFIGURATION
3 REDUCE THE THERMAL LOAD
X
THE CHILLER
WORKS BUT DOES
NOT COOL
1 NO GAS COOLANT
2 PRESENCE OF HUMIDITY IN THE CHILLER CIRCUIT
3 OPEN HOT GAS BY PASS VALVE 1 SEE POINT VII
2 UNLOAD, DRY THE CIRCUIT, REPLACE THE FILTER,
EMPTY IT AND RELOAD IT.
3 CHECK AND/OR REPLACE IT
XI
THE CHILLER
PRODUCES
ABNORMAL
NOISES
1 NOISY COMPRESSOR
2 NOISY THERMOSTAT VALVE
3 VIBRATIONS FROM THE TUBES
4 NOISY BODY 1 SCROLL COMPRESSOR WITH INCORRECT
ROTATION, CHECK THE ENGINE WINDER
CONNECTION COMPLIES WITH THE ELECTRICAL
CHART ON THE ENGINE AND INVERT THE PHASES SO
THAT THE CORRECT ROTATION IS RESPECTED
2 CHECK AND/OR REPLACE IT
3 CHECK AND/OR SUPPORT THE TUBES
4 CHECK THE FASTENING LOCK