Installation and operation manual
9
EKEX EKEXDCBAV3
Option kit for combination of Daikin condensing units
with field supplied evaporators
4PW30903-1
Program the field supplied controller to generate a 0–10 V signal
within conditions as listed. Also refer to the graphic and further data
in this paragraph for more details.
■
When target temperature is reached: 5 V
■
When more capacity is needed: 5–10 V
■
When less capacity is needed: 0–5 V
Operation with fixed T
e
temperature control
The evaporating temperature (
T
e
) at which the application has to
operate can be set by code numbers as listed below.
Operation setting in case of power failure
O
PERATION
AND
DISPLAY
SIGNALS
T
ROUBLESHOOTING
To set up the system and make trouble shooting possible, it is
required to connect the remote controller to the option kit.
Not a malfunction of the air conditioner
The system does not operate
■
The system does not restart immediately after the cooling is
requested.
If the operation lamp lights, the system is in normal operating
condition.
It does not restart immediately because one of its safety devices
actuates to prevent the system from being overloaded. The
system will turn on again automatically after 3 minutes.
■
The system does not restart immediately after the power supply
is turned on.
Wait 1 minute until the micro computer is prepared for operation.
Trouble shooting
If one of the following malfunctions occurs, take the measures shown
below and contact your dealer.
The system must be repaired by a qualified service person.
■
If a safety device such as a fuse, a breaker, or an earth leakage
breaker frequently actuates, or ON/OFF switch does not
properly work.
Turn off the main power switch.
■
If the display
, the unit number and the operation lamp
flash and the malfunction code appears;
Notify your dealer and report the malfunction code.
If the system does not operate properly, and none of the above
mentioned malfunctions is evident, investigate the system according
to the following procedures.
A
Controller voltage output to EKEXFCB
Capacity increase area
Capacity decrease area
Voltage output = linear function with
∆
T
∆
T
= [actual measured temperature] – [target temperature]
When
∆
T=0, the target temperature is reached.
∆
T
max
= maximum temperature variation as defined by installation
Recommended value for
∆
T
max
=[1°C~5°C].
∆
T (°C)
–
∆
T
max
0
+
∆
T
max
Voltage output from controller
(field supply)
0 V
5 V
10 V
Mode No.
Code No.
Description of setting
(*)
(*)
Depending on the operating temperature condition or on selection of the
evaporating unit, operation or safety activation of the outdoor unit may take
priority and actual T
e
will be different from the set T
e
.
13(23)–1
01
T
e
= 3°C
02
T
e
= 4°C
03
T
e
= 5°C
04
T
e
= 6°C (factory setting)
05
T
e
= 7°C
06
T
e
= 8°C
07
T
e
= 9°C
08
T
e
= 10°C
Measures must be taken to ensure that after power failure,
the T1/T2 operation signal is according to the setting of
your preference. Neglecting this caution will result in
improper operation.
Mode No.
Code No.
Description of setting
12(22)–5
01
The T1/T2 operation signal contact
must be open at power restore.
(*)
(*)
After power failure, the T1/T2 operation signal contact must be changed to open
(no cooling requested).
02
After power failure, the status of the
T1/T2 operation signal contact
(operation request) must remain
identical to the initial T1/T2 contact
status prior to the power failure.
0
–
∆
Tmax
+
∆
Tmax
∆
T=0
5
10 V
°C
A
Output
C1/C2 error
signal
Error: open
Abnormal operation on
condenser or control system
Power failure
No error: closed
(relay activated)
Normal operation
T1/T2 is open: no error
detection anymore
C3/C4 operation
signal
Open
Compressor not operating
Closed
Compressor operating
Input
C5/C6: capacity
step
0–10 V
Only necessary for field
setting 13(23)–0 = 01
0–10 V capacity control
(*)
(*)
Refer to paragraph
"Operation with 0–10 V capacity control" on page 8
.
T1/T2 operation
input
(†)
(†) See field setting 12(22)–5.
Open
No cooling requested
Closed
Cooling requested
■
The fan of the evaporator must operate before cooling
operation is required to the outdoor unit.
■
When the operation signal is activated, the evaporator
and fan must operate. Failure to this will cause a
safety to operate or freezing up of the evaporator (air
handling unit).
