Troubleshooting - Daikin EUWAC8FZW1 Installation And Operation Manual

Locking the controller keyboard
Once user parameter h9 is set to 0, the following advanced features
can no longer be carried out by means of the controller:
Modifying direct and user parameters (parameters can be
displayed but not modified),
Resetting the timers.
When user parameter h9 is set to 1, the above-described advanced
features can be carried out using the controller.
To lock or unlock the controller keyboard, proceed as follows:
1 Enter the list of user parameters.
Parameter code :d appears on the display.
2 Select parameter code h9 using the A and/or Z key.
3 Press the R key to switch to the parameter value.
4 Select the appropriate setting using the A and/or Z key.
5 Press the R key to return to the list of parameter codes.
6 To adjust or to consult other user parameters before saving the
modifications, select another user parameter using the A and/
or Z key and then repeat from instruction 3 onwards.
7 To save the modifications, press the E key. To cancel the
modifications wait approximately 40 seconds.
In the first case, the controller saves the changes, leaves the list
of user parameters and returns to normal operation, displaying
the inlet water temperature.
In the second case, the display starts flashing. Approximately
40 seconds later, the controller leaves the list of user
parameters without saving the modifications. The inlet water
temperature re-appears on the display.
Defining the unit's serial address
To control the unit from a supervisory system, an address card
(optional module) should be installed in the unit. The unit's serial
address required for communication with the supervisory system is
defined by parameter ha. The default, limit and step values for the
serial address are:
Default value
1
Limit values 1 to 16
Step value
1
To define the unit's serial address, proceed as follows:
1 Enter the list of user parameters.
Parameter code :d appears on the display.
2 Select parameter code ha using the A and/or Z key.
3 Press the R key to switch to the parameter value.
4 Select the appropriate setting using the A and/or Z key.
5 Press the R key to return to the list of parameter codes.
6 To adjust or to consult other user parameters before saving the
modifications, select another user parameter using the A and/
or Z key and then repeat from instruction 3 onwards.
7 To save the modifications, press the E key. To cancel the
modifications wait approximately 40 seconds.
In the first case, the controller saves the changes, leaves the list
of user parameters and returns to normal operation, displaying
the inlet water temperature.
In the second case, the display starts flashing. Approximately
40 seconds later, the controller leaves the list of user
parameters without saving the modifications. The inlet water
temperature reappears on the display.
Installation and operation manual
13
T
ROUBLESHOOTING
This section provides useful information for diagnosing and correct-
ing certain troubles which may occur in the water chiller.
Before starting the trouble shooting procedure, carry out a thorough
visual inspection of the unit and look for obvious defects such as
loose connections or defective wiring.
Before contacting your local Daikin dealer, read this chapter carefully,
it will save you time and money.
When carrying out an inspection on the supply panel or on
the switch box of the water chiller, always make sure that
the circuit breaker of the water chiller is switched off.
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 Daikin dealer.
Symptom 1: The unit does not start, but the
P
OSSIBLE CAUSES
The temperature setting is not
correct.
Power supply failure.
Blown fuse or interrupted protection
device.
Loose connections.
Shorted or broken wires.
Symptom 2: The unit does not start, but the
P
OSSIBLE CAUSES
The flowstart timer is still running
The anti-recycling timer is still active.
The guard timer is still active.
Symptom 3: The unit does not start and the
P
OSSIBLE CAUSES
One of the following safety devices is
activated:
• Reverse phase protector (R1P)
• Overcurrent relay (K*S)
• Discharge thermal protector (Q*D)
• Evaporating temperature
thermostat (S*T)
• Flow switch (S10L)
• High pressure switch (S*HP)
The unit is in anti-freeze alarm.
The remote ON/OFF input is
enabled and the remote switch is off.
The keyboard is locked. The user
parameter h9 is set to 0.
T
LED lights up
C
ORRECTIVE ACTION
Check the controller setpoint.
Check the voltage on the supply
panel.
Inspect fuses and protection
devices. Replace by fuses of the
same size and type. (Refer to the
wiring diagram delivered with the
unit.)
Inspect connections of the field
wiring and the internal wiring of the
unit. Tighten all loose connections.
Test circuits using a tester and repair
if necessary.
T
LED is flashing
C
ORRECTIVE ACTION
The unit will start after approx. 15
seconds. Make sure that the water is
flowing through the evaporator.
The cicuit can only start up after
approximately 4 minutes.
The circuit can only start up after
approximately 1 minute.
T
LED does not light up
C
ORRECTIVE ACTION
Check on the controller and refer to
symptom 4 "One of the following
safety devices is activated" on
page 14. Refer to the explanation of
the digital controller in the chapter
"Resetting alarms" on page 9.
Check on the controller and refer to
symptom 4 "One of the following
safety devices is activated" on
page 14. Refer to the explanation of
the digital controller in the chapter
"Resetting alarms" on page 9.
Put the remote switch on or disable
the remote ON/OFF input.
Unlock the controller keyboard.
EUWAC5~10FZ
Packaged air-cooled water chillers
4PW14037-1D