Maintenance Activities - Daikin EWAQ080DAYN Operation Manual

Symptom 6: Unit stops soon after operation
6
P
OSSIBLE CAUSES
One of the safety devices is
activated.
Voltage is too low.
Symptom 7: Sensor error 0C9
7
P
OSSIBLE CAUSES
The sensor is broken or not correctly
wired.
Symptom 8: The alarm message shows
8
P
OSSIBLE CAUSES
The software for the wired remote
controller (A4P or A5P) is corrupt or
absent.
Symptom 9: The alarm message shows
9
P
OSSIBLE CAUSES
The extension PCB (A01P) can not
be found.
Symptom 10: The alarm message shows
10
P
OSSIBLE CAUSES
The main PCB of circuit 2 (A21P)
can not be found.
Symptom 11: The alarm message shows
11
P
OSSIBLE CAUSES
The wired remote controller (A4P or
A5P (EKRUPG)) has no correct
communication with the main PCB
(A11P).
Symptom 12: The NETWORK SAFETY
0U4:PCB COMM.PROBLEM
12
P
OSSIBLE CAUSES
The unit can not be found by the
DICN system (EKACPG)
EWAQ080~260DAYN
Packaged air-cooled water chillers
4PW35556-1E
C
ORRECTIVE ACTION
Check safety devices (refer to
Symptom 5: Safety devices are
activated and alarm messages are
displayed).
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).
/ 0CA / 0H9:*** SENSOR ERR
C
ORRECTIVE ACTION
Check if the wiring is according to
the wiring diagram.
Call your local dealer.
0U3:REMOCON SW ERR
C
ORRECTIVE ACTION
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.
0U4:EXT PCB COMM.ERR
C
ORRECTIVE ACTION
Check if the wiring to the extension
PCB (A01P) is according to the
wiring diagram.
Call your local dealer.
0U4:MAINPCB COMM.ERR
C
ORRECTIVE ACTION
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.
0U5:PCB COMM.PROBLEM
C
ORRECTIVE ACTION
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.
alarm message shows
C
ORRECTIVE ACTION
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).
Symptom 13: The NETWORK SAFETY
0U4:SW VERSION ERR
13
P
OSSIBLE CAUSES
All units in the DICN system
(EKACPG) do not have the same
software version.
Symptom 14: The water pressure can not be maintained
P
OSSIBLE CAUSES
There is a leak in the water circuit.
The expansion vessel is broken or
does not work properly.
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.
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.

Maintenance activities

The wiring and power supply must be checked by a
licensed electrician.
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
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.
alarm message shows
C
ORRECTIVE ACTION
Check the software version of each
unit.
Call your local dealer in case a
software upgrade is necessary.
C
ORRECTIVE ACTION
Check for any leaks in the water
circuit.
Replace the expansion vessel.
"Switching the
Operation manual
22