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YORK INTERNATIONAL 45
FORM 160.49-O2
MON. 10:00 AM Low Evap. Low Evap. 54.3 54.4 To restart, press See OPERATION
Pressure Pressure
PSIG (R-22) PSIG (R-22)
compressor switch ANALYSIS Table 2
Transducer 25 25.1 from STOP/RESET Symptom 2
(LEP)
PSIG (R-134a) PSIG (R-134a)
to START position
MON. 10:00 AM Low Evap. LEP external Set to Job Set to Job To restart, press See OPERATION
Pressure control (Brine Spec. Spec. compressor switch ANALYSIS Table 2
Brine units only) from STOP/RESET Symptom 2.
to START position
MON. 10:00 AM Low Oil Low Oil 25 15 Will restart when Refer to OPERATION
Pressure Pressure PSID PSID pressure increases ANALYSIS Table 2
Transducer to 25 PSID. To Symptoms 4, 5, 6, 7,
(OP) restart, press com- 9, 10, 11
pressor switch from
STOP/RESTART to
START position.
MON. 10:00 AM High High Pressure 265 205 Will restart when See Operational
Pressure Safety Control
PSIG (R-22) PSIG (R-22)
Pressure falls to Analysis Table 2
(HP) 180 120 205 PSIG. To restart Symptom 1 High
PSIG (R-134a) PSIG (R-134a)
press compressor Discharge Pressure
switch from STOP/
RESET to START
position
MON. 10:00 AM Evap. Trans. Evap. Pressure To restart press Defective Evap. Pressure
or Probe Transducer or compressor switch Transducer or Leaving
Error Leaving Chilled from STOP/RESET Chilled Water thermistor
Water Thermis- to START position (RS1). LCWT minus satu-
tor (RS1) ration temperature is less
than –2.5°F or greater than
25°F. Checked every 10
minutes following a 10 min.
bypass at start-up.
MON. 10:00 AM Motor Con- CM2 or Solid Reset the device CM2, or Solid State
troller – Ext. State Starter that caused the shut- Starter has shutdown
Reset (RT2) down. Chiller will chiller
start automatically.
MON. 10:00 AM High Discharge Temp. 220°F 219°F To restart press Condenser tubes dirty or
Discharge Thermistor compressor switch scaled or high condenser
Temp. (RT2) from STOP/RESET water temperature. (See
to START position. Symptom 1, Table 1.)
MON. 10:00 AM High Oil Oil Temperature 170°F 169°F To restart press Dirty oil filter or restricted
Temp. Thermistor compressor switch oil cooler line. Change oil
(RT3) from STOP/RESET filter. Refer to OPERATION
to START position ANALYSIS Table 2,
Symptom 9.
MON. 10:00 AM Power Auto-Restart Micro Board 8.29VDC 7.84VDC Optional AUTO Will restart automa- Power Failure.
Failure undervoltage Restart Plug is tically when voltage
circuit on 5V installed on reaches 8.29VDC.
unregulated Micro Board An undervoltage
supply circuit on the Micro
Board monitors the
5VC unregulated
supply for an under-
voltage condition.
MON. 10:00 AM Power Micro Board 8.29VDC 7.84VDC Auto restart plug To restart, press Power Failure
Failure undervoltage is removed on compressor switch
circuit on 5V Micro Board to STOP-RESET
unregulated Position and then to
supply START position
(Continued on page 46)