EWAQ080~260DAYN
Packaged air-cooled water chillers
4PW35556-1E
Operation manual
20
When a safety device was activated, stop the unit and find out why
the safety device was activated before resetting it. Under no circum-
stances safety devices may be bridged or changed to a value other
than the factory setting. If the cause of the problem cannot be found,
call your local dealer.
Symptom 1: The unit does not start, but the ON LED lights up
Symptom 2: The unit does not start, but the ON LED is flashing
Symptom 3: The unit does not start and the ON LED does not light up
3
Symptom 4: The circuit does not start up
Symptom 5: Safety devices are activated and alarm messages are
displayed
5.1
5.2
5.3
5.4
5.5
UNIT WARNING
0AE:FLOW HAS STOPPED
5.2
0C9:INL SENSOR ERR
7
1E3:HP SETBACK
5.7
153:FAN OVERC. ST1
5.4
153:FAN OVERC. ST2
5.4
153:FAN OVERC. ST3
5.4
2E3:HP SETBACK
5.7
253:FAN OVERC. ST1
5.4
253:FAN OVERC. ST2
5.4
253:FAN OVERC. ST3
5.4
NETWORK
SAFETY
0C9:INL SENSOR ERR
7
0U4:PCB COMM.PROBLEM
12
0U4:SW VERSION ERR
13
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The temperature setting is not
correct.
Check the controller setpoint.
The flowstart timer is still running.
The unit will start after approx. 15
seconds. Make sure that water is
flowing through the evaporator.
The circuit can not start up.
Refer to
Symptom 4: The circuit
does not start up
.
Unit is in manual mode (all
compressors at 0%).
Check on the controller.
Power supply failure.
Check the voltage on the supply
panel.
Blown fuse or interrupted protection
device.
Inspect fuses and protection
devices. Replace by fuses of the
same size and type (refer to
"Electrical specifications" on
page 2
).
Loose connections.
Inspect connections of the field
wiring and the internal wiring of the
unit. Tighten all loose connections.
Shorted or broken wires.
Test circuits using a tester and repair
if necessary.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The remote ON/OFF input is
enabled and the remote switch is off.
Put the remote switch on or disable
the remote ON/OFF input.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The unit is in failure mode.
Refer to
Symptom 5: Safety devices
are activated and alarm messages
are displayed
.
One of the following safety devices is
activated:
• Flowswitch (S8L,S9L)
• Emergency stop
Refer to
Symptom 5: Safety devices
are activated and alarm messages
are displayed
.
The ON LED is broken.
Contact your local dealer.
Message safety menu
Symptom
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
One of the following safety devices is
activated:
• Compressor thermal protector (Q*M)
• Overcurrent relay (K*S)
• Discharge thermal protector
• Low pressure
• High pressure switch (S*PH)
• Reverse phase protector
• Freeze-up
Check on the controller and refer to
Symptom 5: Safety devices are
activated and alarm messages are
displayed
.
The anti-recycling timer is still active.
The circuit can only start up after
approximately 5 minutes.
The guard timer is still active.
The circuit can only start up after
approximately 3 minutes.
The circuit is limited to 0%.
Check the enable/disable capacity
limitation remote contact.
Symptom 5.1: Freeze-up protection is activated
(
0A4:FREEZE UP
)
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
Water flow too low.
Increase the water flow.
Inlet temperature to the evaporator is
too low.
Increase the inlet water temperature.
Flow switch is not working or no
water flow.
Check the flow switch and the water
pump.
RESET
After temperature increase the
freeze-up is reset automatically, but
the circuit controller needs to be
reset.
Symptom 5.2: Flowswitch is activated
(
0AE:FLOW HAS STOPPED
)
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
No water flow or too low water flow.
Check the water pump filter and the
water circuit for obstructions.
RESET
After finding the cause, the
flowswitch is reset automatically, but
the controller still needs to be reset.
Symptom 5.3: Pump interlock contact is open
(
0AE:PUMPINTERLOCK
)
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The pump interlock contact is not
closed.
Make sure a pump interlock contact
is wired correctly and closed when
the pump starts operating.
RESET
Only if a pump contactor is
present: Switch the black handle on
the pump fuse inside the switchbox
and reset the controller.
Symptom 5.4: Fan overcurrent is activated
(
153
/
253:FAN OVERC. 1
/
2
/
3
)
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
Mechanical failure (fan is blocked).
Check that the fan rotates freely.
Air flow in the unit too low or outdoor
temperature too high.
Clean the air heat exchanger
properly.
RESET
Push the blue button on the fan fuse
inside the switchbox and reset the
controller.
Symptom 5.5: EEV driver is not operating
(
0A9:EEV
PCB
(
COMM
)
ERR
,
1A9
/
2A9:EEV
ERR
)
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The EEV driver is not operating.
Check the power supply to the EEV
driver.
Check if the address setting by
DIP-switch is according to the
wiring diagram.