This display shows suction and discharge pressures.
The minimum display limit for suction and discharge
pressure is 0 barg. The maximum display limit for
suction pressure is 27.58 barg and for discharge
pressure is 44.7 barg.
The above messages will be repeated sequentially for
System 2.
The above two messages will appear sequentially for
each system. The first display shows accumulated
running hours of each compressor for the specific
system. The second message shows the number of
starts for each compressor on each system.
This message shows the status of the load and unload
timers in seconds until the unit can load or unload.
Whether the unit loads or unloads is determined by how
far the actual liquid temperature is from the
‘SETPOINT’. Refer to capacity control for details of unit
loading and unloading.
The first line of this message shows the temperature
error. That is the difference between the actual leaving
chilled liquid temperature and the 'Setpoint High/Low
Limit' ('SETPOINT' plus/minus 'CONTROL RANGE').
Within the control range the error is zero. The second
line shows the rate of change of leaving chilled liquid
temperature. Refer to capacity control for further details.
This message indicates the current lead system. In the
example system 2 is the lead system, making system 1
the lag system. The lead system can be manually or
automatically selected. Refer to the 'Options' key for
details.
Displayed on YLAA and YLAE units only.
This message indicates the status of the evaporator
pump contact. After the 30 second stop to start timer has
timed out the pump is started by closing a contact
(terminals 23 and 24 on -ARB circuit board on YLAA and
YLAE units and 23 and 24 on -XTBC2 on YCWL/YCRL
units), if there is a 'Leaving Liquid Temperature Cutout',
or any of the compressors are running or with the daily
schedule not calling for a shutdown with unit switch on
and the remote stop/start input closed (terminals 13 and
14 on -ARB circuit board on YLAA and YLAE units and
13 and 51 on -XTBC1 on YCWL/YCRL units).
On YLAA and YLAE units fitted with optional Hydro Kit,
the above message relates to the unit internal pump.
On dual pump Hydro Kits the following messages are
displayed:
This message indicates the total hours that the pump
contact is closed (terminals 23 and 24 on -ARB circuit
board on YLAA and YLAE units and 23 and 24 on
-XTBC2 on YCWL/YCRL units)
If the optional Hydro Kit is fitted the above message
relates to the unit internal pump.
On dual pump Hydro Kits the following messages are
displayed:
1
-
20
Form 201.26.OI1(11/09)
S Y S
1
S P
=
3 .
3 9
B A R G
D P
=
1 5 .
6
B A R G
S Y S
X
H O U R S
1 = X X X X X
2 = X X X X X
3 = X X X X X
S Y S
X
S T A R T S
1 = X X X X X
2 = X X X X X
3 = X X X X X
L O A D
T I
M E R
=
5 8
S E C
U N L O A D
T I
M E R
=
0
S E C
T E M P
E R R O R
1 0 .
1
° C
T E M P
R A T E
0 .
7
° C /
M
L E A D
S Y S T E M
I
S
S Y S T E M
N U M B E R
2
E V A P O R A T O R
H E A T E R
S T A T U S
I
S
O F F
E V A P O R A T O R
W A T E R
P U M P
S T A T U S
I
S
O N
E V A P O R A T O R
W A T E R
P U M P
S T A T U S
Y Y Y Y
YYYY = ON, OFF, TRIP
E V A P O R A T O R
W A T E R
P U M P
1
S T A T U S
Y Y Y Y
E V A P O R A T O R
W A T E R
P U M P
2
S T A T U S
Y Y Y Y
YYYY = ON, OFF, TRIP
E V A P
P U M P
T O T A L
R U N
H O U R S
=
3 2
P U M P
N O 1
T O T A L
R U N
H O U R S
=
3 2
P U M P
N O 2
T O T A L
R U N
H O U R S
=
1 2
