Operation manual
19
EWWD120~540MBYNN
Packaged water-cooled water chillers
4PW22685-1
5.8
Symptom 6: Unit stops soon after operation
Symptom 7: Unit runs continuously and the water temperature remains
higher than the temperature set on the controller
Symptom 8: Excessive noises and vibrations of the unit
Symptom 9: The display shows
(only in a DICN system)
Symptom 10: The
message shows
10
Symptom 11: The alarm message shows
11
Symptom 12: The alarm message shows
12
Symptom 13: Sensor or transmitter error
13
Symptom 14: The alarm message shows
, ;;;
14
Symptom 15: The alarm message shows
0
15
Symptom 5.8: Compressor thermal protector is activated
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
Compressor motor coil temperature
too high.
Compressor is not cooled sufficiently
by the refrigerant medium.
RESET
After temperature decrease the
thermal protector is reset
automatically, but the circuit
controller needs to be reset.
If the protector is activated
frequently, call your local dealer.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The schedule timer is activated and
is in off mode.
Work according to the settings in the
schedule timer or disable the
schedule timer.
One of the safety devices is
activated.
Check safety devices (refer to
Symptom 5: 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.
The circuit is limited.
Check the "enable/disable capacity
limitation" remote contact.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
Unit has not been fixed properly.
Fix the unit as described in the
installation manual.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The adresses set on the PCB or
controller are wrong.
Make sure to set the correct
adresses. Refer to "Setting the
adresses" in the installation manual.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
A unit can not be found by the DICN
system.
Make sure all units in the DICN
system are powered or make sure
the correct number of slaves is
defined in the master unit.
The EEV driver can not be found by
the unit system.
Check the wiring. Call your local
dealer.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The control motor is not reacting due
to bad wiring to the motor or the
motor is damaged.
Check if the wiring to the control
motor is correct and not damaged or
loose.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The control motor is operating in
reverse due to wrong wiring.
Check if the wiring is according to
the wiring diagram.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The wiring is wrong.
Check if the wiring is according to
the wiring diagram. Call your local
dealer.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The alarmmessage indicates a
error code.
The suction temperature sensor is
not well mounted in the suction pipe.
Check the suction temperature
sensor and make sure that it is
properly mounted in its holder on the
suction pipe. Call your local dealer.
The alarm message indicates a
or
errorcode.
Call your local dealer.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The expansion board controller
(A11P) can not be found.
Check if the wiring to the expansion
board controller (A11P) is according
to the wiring diagram. Call your local
dealer.
