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Alarm and Trip Messages
TAH-140 "HIGH SUMP OIL TEMPERATURE"
High oil temperature can cause refrigerant to
decompose, releasing corrosive gasses into the system
and contaminating the refrigerant charge. The alarm
is signaled if the measured oil temperature exceeds the
setpoint value.
PDH-143 " HIGH COMPRESSOR OIL
PRESSURE"
The high compressor oil pressure alarm is signaled if the
measured oil pressure exceeds the setpoint value.
PAH-113 "HIGH DISCHARGE PRESSURE"
The chiller system is under high pressure during
operation. If the pressure at the compressor discharge
exceeds predetermined limits, the alarm sounds.
TAH-113 " HIGH DISCHARGE
TEMPERATURE"
If the compressor discharge temperature exceeds
setpoint limits, the alarm sounds.
" R1 HARDWIRE RELAY NOT RESET"
The R1 Hardwire Trip Relay is staged in series with
the system reset switch. If the system trips off line,
the reset switch must be engaged in order to bring the
chiller back online.
PS-150 " GEAR OIL PRESSURE SWITCH
MALFUNCTION"
The gear oil pressure switch has two states: open and
closed. Two simultaneous signals from the switch would
indicate a malfunction, sounding the alarm.
PSL-150 " LOW GEAR OIL PRESSURE"
The Gearbox requires proper oil pressure to ensure
proper lubrication. If the sensor indicates pressure
below setpoint, the alarm sounds.
SAH-160A "ENGINE OVERSPEED"
The maximum allowable engine speed is manufacturer
specifi ed and defi ned by setpoint. If the setpoint engine
speed is exceeded, the alarm sounds.
PAL-160 "ENGINE LOW OIL PRESSURE"
If the engine oil pressure drops below safe limits, the
alarm is triggered.
38
ZAL-140 " COMPRESSOR PROX FORWARD (J-
SERIES ONLY)"
The compressor proximity thrust probe protects the
impeller from damage as a result of thrust bearing
wear. If the proximity probe detects the impeller is too
far forward, the system trips off line.
ZAL-140 " COMPRESSOR PROX REVERSE (J-
SERIES ONLY)"
The compressor proximity thrust probe protects the
impeller from damage as a result of thrust bearing
wear. If the proximity probe detects the impeller is too
far backward, an alarm is signaled.
TRIP MESSAGES
In the event of a system trip, the operator will need to
verify the cause of the trip and take action to correct
the fault. When the fault has been cleared, the system
may be restarted by pressing the RESET button on the
control panel or by selecting the F5 SYSTEM RESET
tab on the Home Screen. If the EMERGENCY STOP
switch has been depressed on either the main panel or
the engine panel, it will have to be manually opened
before the system can be brought back on line.
" 5 VOLT SUPPLY REFERENCE FAILED"
Some system sensors require a 5 volt reference signal
for proper measurement. Failure of this reference signal
trips the system.
" AUXILIARY SAFETY SHUTDOWN
INITIATED"
In some installations there may be additional safety
sensors or switches tied into the system, as specifi ed
by the customer. If one of these sensors or switches
signals a shutdown, the system will trip off line.
FSL-100 "LOW CHILLED WATER FLOW"
A sensor in the chilled liquid pipes registers whether or
not the liquid is fl owing. If this sensor does not detect
fl ow, the system trips off line.
PS-151 " CLUTCH PRESSURE SWITCH
MALFUNCTION"
The clutch pressure switch has two states: open and
closed. If the system logic detects two simultaneous
signals, a switch malfunction is indicated and the system
will fall off line.
FORM 160.60-O2 (1004)
YORK INTERNATIONAL
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