EWAQ080~260DAYN
Packaged air-cooled water chillers
4PW35556-1E
Operation manual
22
Symptom 6: Unit stops soon after operation
6
Symptom 7: Sensor error
0C9
/
0CA
/
0H9:*** SENSOR ERR
7
Symptom 8: The alarm message shows
0U3:REMOCON SW ERR
8
Symptom 9: The alarm message shows
0U4:EXT PCB COMM.ERR
9
Symptom 10: The alarm message shows
0U4:MAINPCB COMM.ERR
10
Symptom 11: The alarm message shows
0U5:PCB COMM.PROBLEM
11
Symptom 12: The
NETWORK SAFETY
alarm message shows
0U4:PCB COMM.PROBLEM
12
Symptom 13: The
NETWORK SAFETY
alarm message shows
0U4:SW VERSION ERR
13
Symptom 14: The water pressure can not be maintained
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 must be executed at least once a year. In case the unit is
used for other applications, the checks must be executed every
4 months.
Maintenance activities
■
Air heat exchanger
Remove dust and any other contaminant from the coil fins using
a brush and a blower. Blow from the inside of the unit. Take care
not to bend or damage the fins.
■
Field wiring and power supply
•
Check the power supply voltage on the local supply panel. The
voltage must 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 boxes 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
"Switching the
unit on" on page 8
.
■
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.
■
Fan motor
•
Clean the cooling ribs of the motor.
•
Check on abnormal noises. If the fan or motor are damaged, call
your local dealer.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
One of the safety devices is
activated.
Check safety devices (refer to
Symptom 5: Safety devices are
activated and alarm messages are
displayed
).
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 sensor is broken or not correctly
wired.
Check if the wiring is according to
the wiring diagram.
Call your local dealer.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The software for the wired remote
controller (A4P or A5P) is corrupt or
absent.
Check if the wiring to the main PCB
(A11P) is according to the wiring
diagram.
Check if the "address setting" and
the "terminator resistor setting" by
DIP-switch is according to the setting
mentioned in the wiring diagram.
Call your local dealer.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The extension PCB (A01P) can not
be found.
Check if the wiring to the extension
PCB (A01P) is according to the
wiring diagram.
Call your local dealer.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The main PCB of circuit 2 (A21P)
can not be found.
Check if the wiring to the main PCB
of circuit 2 (A21P) is according to the
wiring diagram.
Check if the "address setting" and
the "terminator resistor setting" by
DIP-switch is according to the setting
mentioned in the wiring diagram.
Call your local dealer.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The wired remote controller (A4P or
A5P (EKRUPG)) has no correct
communication with the main PCB
(A11P).
Check if the wiring to the main PCB
(A11P) is according to the wiring
diagram.
Check if the "address setting" and
the "terminator resistor setting" by
DIP-switch is according to the setting
mentioned in the wiring diagram.
Call your local dealer.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The unit can not be found by the
DICN system (EKACPG)
Check if the wiring between units is
according to the wiring diagram.
• Make sure all the units in the DICN system
are powered up.
• Make sure that the correct number of slave
units is defined in the master unit.
• Make sure that the correct unit address
setting is defined in each unit (refer to the
installation manual).
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
All units in the DICN system
(EKACPG) do not have the same
software version.
Check the software version of each
unit.
Call your local dealer in case a
software upgrade is necessary.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
There is a leak in the water circuit.
Check for any leaks in the water
circuit.
The expansion vessel is broken or
does not work properly.
Replace the expansion vessel.
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.
Never clean the unit with water under pressure.
The wiring and power supply must be checked by a
licensed electrician.