Ii.11 Check-List - Hitecsa EQP1X 117 Manual De Instalación, Uso Y Mantenimiento

II.11 CHECK-LIST

1 - OUTLET PRESSURE HIGH
Insufficient cooling air at air-side exchanger:
Fan does not run:
Excessive refrigerant charge:
Insufficient water flow to the heat exchangers in
Insufficient water flow to the recovery unit in
2 - OUTLET PRESSURE LOW
Insufficient refrigerant charge:
Mechanical problems in the compressor:
3 - INLET PRESSURE HIGH
Excessive thermal load:
Irregular operation of the expansion valve:
Mechanical problems in the compressor:
4 - INLET PRESSURE LOW
Insufficient refrigerant charge:
Filter partially obstructed (appears frosted):
Irregular operation of the expansion valve:
Presence of air in the water system:
Insufficient water flow:
5 - THE COMPRESSOR DOES NOT START
Microprocessor board alarm:
No voltage, switch open:
Overload protection triggered:
No request for cooling with user system set point correct:
Working set point too high:
Defective contactors:
Compressor electric motor failure:
6 - THE COMPRESSOR MAKES A BUZZING NOISE
Incorrect power supply voltage:
Compressor contactor stuck:
Mechanical problems in the compressor:
7 - THE COMPRESSOR STARTS AND STOPS
Faulty low pressure switch:
Insufficient refrigerant charge.
Refrigerant line filter clogged (appears frosted):
Irregular working of the expansion valve:
8 - THE COMPRESSOR STOPS
Faulty high pressure switch:
Insufficient cooling air at air-side exchanger:
Excessive ambient temperature:
Insufficient water flow to the heat exchangers in
Insufficient water flow to the recovery unit in
Excessive refrigerant charge.
9 - THE COMPRESSOR IS NOISY AND VIBRATES
Compressor is pumping liquid, excessive refrigerant fluid in crankcase:
Mechanical problems in the compressor:
Unit running at the limit of specified conditions of use.
10 - THE COMPRESSOR RUNS CONTINUOUSLY
Excessive thermal load:
Working set point too low in cooling cycle (too high in heating cycle):
Insufficient refrigerant charge:
Refrigerant line filter clogged (appears frosted):
Control board faulty:
Irregular working of the expansion valve:
Compressor contactor stuck:
11 - THE FAN DOES NOT WORK OR STARTS AND STOPS
12 - THE CIRCULATION PUMP DOES NOT START
Thermal protection activated:
Lack of voltage to the pump unit:
Pump blocked:
Pump motor failure:
Remote ON/OFF switch in OFF position):
IOM_EQP1X_117a133_208094_200901_ES-EN-FR-DE-IT
PROBLEM
SELECT 1 / 2 mode:
AUTOMATIC 2 mode:
SELECT 1 / 2 mode:
AUTOMATIC 2 mode:
SECTION II: INSTALLATION AND MAINTENANCE
RECOMMENDED ACTION
check the technical clearances and whether the coil is obstructed.
check whether the fan is working.
drain the excess.
check that the pumps are working.
check the recovery water system.
1 - identify and eliminate any leaks;
2 - restore correct charge.
replace compressor.
check system sizing, infiltrations and insulation.
check operation.
replace compressor.
1 - identify and eliminate any leaks;
2 - restore correct charge.
replace filter.
check operation.
bleed the water system.
check that the pump is working.
identify alarm and take appropriate action.
close the switch.
1 - reset the switch;
2-check the unit at start up.
check and if necessary wait for cooling request.
check and if necessary readjust set-point.
replace contactor.
check for short circuit.
check voltage, investigate causes.
replace contactor.
replace compressor.
check pressure switch calibration and operation.
1 - identify and eliminate any leaks;
2 - restore correct charge.
replace filter.
check operation.
check pressure switch calibration and operation.
1 - check clearances and make sure coils are not obstructed;
2 - check that the fan is working.
check unit operation limits.
check that the pumps are working.
check the recovery water system.
discharge surplus refrigerant.
1 - check operation of the expansion valve;
2 – check and/or adjust the overheating;
3 - replace the expansion valve.
replace compressor.
check unit operation limits.
check system sizing, leakage and insulation.
check setting and reset.
1 - identify and eliminate any leaks;
2 - restore correct charge.
replace filter.
replace the board.
check operation.
replace contactor.
1 - check for short-circuits;
2 - replace the fan.
check electrical connections.
unblock the pump.
replace the pump.
put in ON position.
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