York YZ MODEL A, Руководство по эксплуатации и обслуживанию

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JOHNSON CONTROLS
92
FORM 161.01-OM1
ISSUE DATE: 6/8/2018
SECTION 3 - OPTIVIEW™ CONTROL CENTER FUNCTIONS AND NAVIGATION
TABLE 9 - 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 (1.7 °C). The condenser pump run contacts close. The message is auto-
matically reset and pump contacts return to prior state when either the chiller is not in
stopped state or the Saturated Condenser Temperature > 40.0 °F (4.4 °C).
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 un -
til the transducer outputs are within the acceptable range of each other and the WARN-
ING RESET key in SERVICE access level.
WARNING – HARMONIC
FILTER - INVALID MODEL
This warning is set when the Harmonic Filter Model is invalid. The warning is rest when
the filter model is valid or the filter operation is inhibited.
WARNING – MBC SPEED
SIGNAL FAULT
The speed signal from the Speed Sensor 1 is not reading. The chiller will continue to run
and the warning message will clear when the speed sensor signal is reading again.
WARNING - LIQUID LEVEL
SETPOINT NOT ACHIEVED
The chiller is running and Refrigerant Level > (Refrigerant Level se15%) OR
Refrigerant Level < (Refrigerant Level setpoint -15%) for 10 continuous minutes. The
Warning is bypassed for the first 30 minutes of run to allow stabile operation to estab -
lish. It is released when the chiller is not running or Refrigerant Level is within setpoint
+- 15%. The message clears automatically.
WARNING - LOSS OF
SUBCOOLER LIQUID SEAL
The chiller is running greater than 30 minutes and the Subcooler Effectiveness value
decreased less than 0.400 (ADMIN programmable) at any drop leg refrigerant tempera-
ture or increased greater than 1.50 (ADMIN programmable) when the drop leg refriger-
ant temperature is at least 0.5 °F (-17.5 °C) below or any amount above the Entering
Condenser Liquid Temperature. The subcooler effectiveness is (Condenser Sat Temp -
Drop leg refrigerant temp)/(Cond Sat Temp - Entering Condenser Liquid Temp). To clear
message press WARNING RESET key on HOME Screen when logged in at OPERA-
TOR (or higher) access level.
WARNING – MBC – LOW
AMPLIFIER RESISTANCE
This warning is displayed when any of the MBC Amplifier resistances are low.
WARNING – MBC – HIGH
AMPLIFIER RESISTANCE
This warning is displayed when any of the MBC Amplifier resistances are high.
WARNING – MBC – LOW
AMPLIFIER CURRENT
This warning is displayed when any of the MBC Amplifier currents are low.
WARNING – MBC – HIGH
AMPLIFIER CURRENT
This warning is displayed when any of the MBC Amplifier currents are high.
WARNING – MBC – POSITION
SENSOR ERROR
This warning is displayed when any of the MBC Position Sensors read in error.
WARNING – MBC – INTERNAL
ALARM
The MBC experienced an unsatisfactory condition detected internally to the control sys-
tem. This message will clear when the condition is resolved and the WARNING RESET
key is pressed in OPERATOR (or higher) access mode.