Display Messages - York CodePak YK L1 L1 G4 Operation Manual

The following displayed messages will be automatically
displayed unless the operator is requesting additional
information via the keypad.
SYSTEM RUN – CURRENT LIMIT IN EFFECT
Displayed when the chiller is running, and the motor
current is equal-to or greater-than the operator-pro-
grammed "XXX % FLA" current limit value. When the
motor current reaches 100% of this value, the pre-
rotation vanes are not permitted to open further. If the
current continues to rise to 104% of this value, the
vanes will be driven closed – not fully closed; only far
enough to allow the current to decrease to a value less
than 104% of the operator-programmed "XXX % FLA"
current limit.
For example:
With the operator-programmed "% CURRENT LIMIT"
set at 50% and the FLA of the chiller equal to 200A, the
current limit circuit would perform as follows:
(100%) (50% x FLA) = Vanes inhibited from open-
ing further.
(104%) (50% x FLA) = Vanes driven toward close
position.
Therefore:
(100%) (50% x 200) = 100A = Vanes stop open-
ing
(104%) (50% x 200) = 104A = Vanes driven to-
ward close position.
SYSTEM RUN – AUTO VANES
Displayed when the chiller is running, the MicroCom-
puter Control Center is in SERVICE mode, and the
vanes are operating in AUTO mode.
SYSTEM RUN – VANES OPENING
Displayed when the chiller is running, the MicroCom-
puter Control Center is in SERVICE mode with:
• The vanes operating in AUTO mode and opening to
maintain the leaving chilled water temperature set-
point.
– or –
YORK INTERNATIONAL

DISPLAY MESSAGES

• The operator has pressed the vanes OPEN key on
the keypad.
SYSTEM RUN – VANES CLOSING
Displayed when the chiller is running, the MicroCom-
puter Control Center is in SERVICE mode with:
• The vanes operating in AUTO mode and closing to
maintain the leaving chilled water temperature
setpoint.
• The operator has pressed the vanes CLOSE key on
the keypad.
SYSTEM RUN – VANES HOLDING
Displayed when the chiller is running, the MicroCom-
puter Control Center is in SERVICE mode, and the
operator has pressed the vanes HOLD key.
SYS READY TO START – VANES OPENING
Displayed when the chiller is running and the operator
has pressed the vanes OPEN key on the keypad.
SYS READY TO START – VANES CLOSING
Displayed when the chiller is not running and the op-
erator has pressed the vanes CLOSE key on the key-
pad.
SYS READY TO START – VANES HOLDING
Displayed when the chiller is running and the operator
has pressed the vanes HOLD key on the keypad.
SYSTEM RUN – LOW PRESSURE LIMIT IN EFFECT
Displayed when the chiller is running and the evapora-
tor pressure falls to 56.2 PSIG, 387.5 kPa (R-22); 27
PSIG, 186.1 kPa (R134a). Simultaneously, the pre-ro-
tation vanes will be prevented from further opening.
The action maintains chiller operation to prevent low-
evaporator-pressure shutdown at 54.3 PSIG, 374.0 kPa
(R-22); 25 PSIG, 172.4 kPa (R-134a). When the evapo-
rator pressure rises to 57.5 PSIG, 396.5 kPa (R-22);
28 PSIG, 193 kPa (R-134a), the vanes will be permit-
ted to open. Low pressure limit feature is not used when
program jumper (JP3) is cut (Brine application).
FORM 160.49-O1
– or –
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