Table 89: Warning messages
Message Description
WARNING - CONDENSER
FREEZE THREAT FROM
LOW PRESSURE
While the chiller state is Stopped, the Saturated Condenser Temperature
decreased below 35.0 °F. The condenser pump run contacts close.
The message is automatically reset and pump contacts return to prior
state when either the chiller is not in stopped state or the Saturated
Condenser Temperature is > 40.0 °F.
WARNING – CONDENSER
– HIGH PRESSURE
LIMIT
The Condenser Pressure exceeds the High Pressure Warning Setpoint
threshold, programmed by a service technician logged in at SERVICE
access level. While this condition is in effect, the chiller capacity is in
override to reduce pressure. This message automatically clears and
normal LCHLT capacity control restored when the Condenser pressure
decreases to below the Setpoint.
WARNING – CONDENSER
OR EVAPORATOR XDCR
ERROR
The Evaporator pressure Transducer is indicating a higher pressure
than the Condenser pressure Transducer after the chiller has been
running for 10 minutes. This is indicative of a Condenser or Evaporator
Transducer failure. This message will be displayed until the condition
clears and the WARNING RESET Keypad key is pressed in OPERATOR (or
higher) access mode. Condition not checked in Brine mode.
WARNING – CONDENSER
OR VGD SENSOR
FAILURE
The difference between the Discharge Pressure Transducer output
and the Condenser Pressure Transducer output has exceeded 21 PSID
for 3 continuous minutes while the chiller was running. This feature
verifies the operation of the transducers. Since both transducers are
measuring essentially the same pressure, both outputs should be within
the specified tolerance. This message must be manually cleared. It will
be displayed until the transducer outputs are within the acceptable
range of each other and the WARNING RESET key in SERVICE access
level.
WARNING –
EVAPORATOR – LOW
PRESSURE LIMIT
The Evaporator pressure has decreased to the Warning threshold.
This threshold is fixed in Water cooling applications. In Brine cooling
applications, the threshold is a fixed amount above the programmable
safety shutdown threshold. The Safety threshold in Brine applications
is determined by the Brine solution and is determined by the YORK
Factory. While this condition is in effect, the chiller capacity control is
in override to increase suction pressure. This message automatically
clears and normal LCHLT capacity control restored when the Evaporator
pressure increases to the reset value.
Warning threshold (psig) Reset threshold (psig)
Water Brine Water Brine
27.0 +2.0>Safety Setpoint 28.0 +3.0>Safety Setpoint
WARNING – EXCESS
SURGE DETECTED
(Applies only if Surge Protection SHUTDOWN feature is Disabled) The
Surge Window Count has exceeded the Count Limit. Message can be
manually cleared after the Surge Window Count is less than or equal to
the Count Limit, or the SHUTDOWN feature is Enabled or the chiller is
stopped. To clear message press WARNING RESET key on HOME Screen
when logged in at OPERATOR (or higher) access level.
YMC
2
Mod B with OptiView
™
Control Center
110
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