Johnson Controls YORK YMC2 Operation And Maintenance Manual

Run messages
Table 94: Run messages
Message Description
LEAVING CHILLED
LIQUID CONTROL
The chiller is running, controlling the Leaving Chilled Liquid to the
Leaving Chilled Liquid Temperature Setpoint. Or if the unit is a
Heatpump and the Control Mode is Cooling.
LEAVING CONDENSER
LIQUID CONTROL
The chiller is running, controlling the Leaving Condenser Liquid to
the Leaving Condenser Liquid Temperature Setpoint. If the unit is a
Heatpump and the Control Mode is Heating.
LEAVING CHILLED &
CONDENSER LIQUID
CONTROL
The chiller is running, controlling the either Leaving Chilled Liquid or
Leaving Condenser Liquid Temperature. If the unit is a Heatpump and
the Control Mode is Cooling & Heating.
WARNING – VSD DC
BUS ACTIVE
This non-annunciating message alerts that the DC Bus is precharged
or pre-regulated for a state outside of chiller run. It is set when the VSD
indicates a precharge or pre-regulated state or DC Bus voltage >50v
in the stopped state. A countdown timer shows with this message to
indicate the time remaining in a precharge or pre-regulate command
while stopped.
VSD – HIGH INPUT
CURRENT LIMIT
The Chiller Input current is greater than or equal to the Active Current
Limit Setpoint. The Current Limit Setpoint is programmed over a range
of 30 to 100% of the Chiller Full Load Amps (FLA). The Active limit is
the minimum of the Local, pulldown (if active), and Remote Current
Limit Setpoints in Remote mode or the remote value in BAS (ISN)
mode. While this condition is in effect, chiller capacity control is in
override to reduce current. Normal LCHLT capacity control operation is
resumed and this message automatically clears when the input current
decreases below this limit.
The highest of the three phase input currents divided by the
programmed Job Input FLA is compared to the limit for this override.
VSD – INPUT
PULLDOWN LIMIT
The chiller input current will be limited by the pulldown demand limit
setpoint. The message clears when the pulldown demand time expires.
SYSTEM RUN - ACTIVE
OPTIMIZER
The chiller is running, and the Optimizer is Active.
SYSTEM RUN -
PASSIVE OPTIMIZER
The chiller is running, and the Optimizer is Passive.
SYSTEM RUN -
COOLING
The chiller is running, Heat Pump is Enabled and Control Mode is
Cooling, Optimizer is OFF.
SYSTEM RUN -
HEATING
The chiller is running, Heat Pump is Enabled and Control Mode is
Heating.
SYSTEM RUN -
COOLING and HEATING
The chiller is running, Heat Pump is Enabled, Control Mode is Cooling,
and Heating.
YMC
2
Mod B with OptiView Control Center
96

Johnson Controls YORK YMC2 Specifications

General

Brand	Johnson Controls
Model	YORK YMC2
Category	Chiller
Language	English