Daikin Hydrocube EWLP012KAW1N, Руководство по эксплуатации

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EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
Operation manual
12
Symptom 5: Unit stops soon after operation
Symptom 6: Unit runs continuously and the water temperature remains
higher than the temperature set on the controller
Symptom 7: Excessive noises and vibrations of the unit
M
AINTENANCE
In order to ensure optimal availability of the unit, a number of checks
and inspections on the unit and the field wiring have to be carried out
at regular intervals.
If the unit is used for air conditioning application, the described
checks should be executed at least once a year. In case the unit is
used for other applications, the checks should be executed every
4 months.
Maintenance activities
■
Field wiring and power supply
• Check the power supply voltage on the local supply panel. The
voltage should correspond to the voltage marked on the identifi-
cation label of the unit.
• Check the connections and make sure they are properly fixed.
• Check the proper operation of the circuit breaker and the earth
leak detector provided on the local supply panel.
■
Internal wiring of the unit
Visually check the switch box on loose connections (terminals
and components). Make sure that the electrical components are
not damaged or loose.
■
Earth connection
Make sure that the earth wires are still connected properly and
that the earth terminals are tightened.
■
Refrigerant circuit
• Check for leaks inside the unit. In case a leak is detected, call
your local dealer.
• Check the working pressure of the unit. Refer to paragraph
"Switching the EWLP unit on" on page 6 .
■
Compressor
• Check on oil leaks. If there is an oil leak, call your local dealer.
• Check for abnormal noises and vibrations. If the compressor is
damaged, call your local dealer.
■
Water supply
• Check if the water connection is still well fixed.
• Check the water quality (refer to the installation manual of the unit
for specifications of the water quality).
Disposal requirements
Dismantling of the unit, treatment of the refrigerant, of oil and of other
parts must be done in accordance with relevant local and national
legislation.
Symptom 4.3: High-pressure switch
P
OSSIBLE CAUSES
C
ORRECTIVE ACTION
Condenser fan does not operate
properly. Check that the fans turn freely. Clean
if necessary.
Dirty or partially blocked condenser. Remove any obstacle and clean
condenser coil using brush and
blower.
Inlet air temperature of the
condenser is too high. The air temperature measured at the
inlet of the condenser should not
exceed 43°C.
RESET After pressure decrease, the high
pressure switch resets automatically,
but the controller still needs to be
reset.
Symptom 4.4: Reverse phase protector is activated
P
OSSIBLE CAUSES
C
ORRECTIVE ACTION
Two phases of the power supply are
connected in the wrong phase
position. Invert two phases of the power
supply (by licensed electrician).
One phase is not connected
properly. Check the connection of all phases.
RESET After inverting two phases or fixing
the power supply cables properly,
the protector is reset automatically,
but the unit still needs to be reset.
Symptom 4.5: Discharge thermal protector is activated
P
OSSIBLE CAUSES
C
ORRECTIVE ACTION
Unit is working outside the operation
range. Check the operation condition of the
unit.
RESET After temperature decrease, the
thermal protector resets
automatically but the controller still
needs to be reset.
Symptom 4.6: Flow switch is activated
P
OSSIBLE CAUSES
C
ORRECTIVE ACTION
No water flow. Check the water pump.
RESET After finding the cause, the flow
switch is reset automatically, but the
controller still needs to be reset.
P
OSSIBLE CAUSES
C
ORRECTIVE ACTION
One of the safety devices is
activated. Check safety devices (refer to
symptom "4. One of the following
safety devices is activated").
Voltage is too low. Test the voltage in the supply panel
and, if necessary, in the electrical
compartment of the unit (voltage
drop due to supply cables is too
high).
P
OSSIBLE CAUSES
C
ORRECTIVE ACTION
The temperature setting on the
controller is too low. Check and adjust the temperature
setting.
The heat production in the water
circuit is too high. The cooling capacity of the unit is too
low. Call your local dealer.
Water flow is too high. Recalculate the water flow.
P
OSSIBLE CAUSES
C
ORRECTIVE ACTION
Unit has not been fixed properly. Fix the unit as described in the
installation manual.
Before carrying out any maintenance or repair activity,
always switch off the circuit breaker on the supply panel,
remove the fuses or open the protection devices of the
unit.
Do never clean the unit with water under pressure.
The wiring and power supply must be checked by a
licensed electrician.