Johnson Controls YORK YMC2 Operation And Maintenance Manual

Table 97: Warning messages
Message Description
WARNING – UPS
– CHECK BATTERY
CONNECTION
This manual reset warning is set when Battery Voltage > 16.0 V.
(Indicates only the UPS output is connected to the battery leads). It is
released when Battery Voltage < 16.0 V.
WARNING – UPS –
LINE LOW BATTERY
VOLTAGE
This auto reset warning is set when all of the following are true:
• Control Voltage digital input is high (indicates line power is
available)
• Battery Voltage < Line Low Battery Voltage Threshold
It releases when Battery Voltage > Line Low Battery Voltage Threshold +
0.1 V
WARNING – UPS – NOT
CHARGING
This auto reset warning is set when all of the following are true for 5
continuous seconds:
Control Voltage digital input is high (indicates line power is available)
• UPS Line / Charging digital input is low (indicates UPS not reporting
in charge mode)
It releases when any of the following are true:
• Control Voltage digital input is low (indicates line power is lost)
• UPS Line / Charging digital input is high (UPS is reporting in charge
mode)
WARNING – VSD
– INPUT VOLTAGE
IMBALANCE
Line voltage imbalance shall be calculated, for every VSD
communications cycle, as:
where V
ab
, V
bc
and V
ca
are line-to-line total rms voltages received from
the drive, max is the function which selects the largest of its arguments,
and:
If Vimb% exceeds 5% continuously for 45 seconds, the warning will be
displayed. The 45 second timer shall reset and the warning shall clear if
three consecutive imbalance readings fall below the 5% threshold.
Routine shutdown messages
Table 98: Routine shutdown messages
Message Description
LOCAL STOP
A local shutdown command has been received by pressing the Keypad
Stop key.
REMOTE STOP
A shutdown command has been received from a remote device. Remote
Stop commands can be received in Digital Remote mode via I/O Board
TB4-7/8 or in BAS (ISN) (Integrated Systems Network) Remote mode via
the SC-Equip Gateway serial communications. If the chiller is running
when this occurs, the chiller performs a soft shutdown.
101
YMC
2
Mod B with OptiView Control Center

Johnson Controls YORK YMC2 Specifications

General

Brand	Johnson Controls
Model	YORK YMC2
Category	Chiller
Language	English