York CodePak YK L1 L1 G4 User Manual

YORK INTERNATIONAL 21
FORM 160.49-O1
DISPLAY MESSAGES
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 –
• 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.
– or –
• 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).

York CodePak YK L1 L1 G4 Specifications

General

Brand	York
Model	CodePak YK L1 L1 G4
Category	Chiller
Language	English