York YK M3 M3 G4 THRU YK S6 S4 J2, YK LB LB G4 THRU YK SE SC J4 Phase rotation/loss

has increased to 265 PSIG (R-22); 180 PSIG (R-134a). System will be allowed to restart when pressure de- creases to 205 PSIG (R-22); 120 PSIG (R-134a). Pres- sure is sensed by a High Pressure (HP) safety control that is located on a mounting bracket above the oil- pump starter located on the condenser. This message is prompted by the opening of the HP safety control contacts. To restart chiller, press COMPRESSOR switch to the STOP/RESET position and then to the START position.

MON XX:XX AM – EVAP TRANS OR PROBE ERROR

The chiller is shut down because the leaving chilled water temperature minus the evaporator saturation tem- perature is outside the range of –2.5°F to +25°F con- tinuously for 10 minutes. To restart the chiller, press COMPRESSOR switch to STOP/RESET switch to STOP/RESET position and then to START position. On Brine applications (program jumper JP3 removed), this check is not performed when the evaporator transducer is reading a pressure below its “out-of-range” thresh- old.

On Steam Turbine applications (Micro Board program jumper JP4 removed), with EPROM version C.02F

(T).12 or later, this check is bypassed for the first 20 minutes of chiller run time and then performed at the regular 10 minute intervals thereafter. This is to allow for the additional time required to decrease the evapo- rator pressure due to the longer acceleration time of the steam turbine.

MON XX:XX AM – MOTOR CONTROLLER – EXT. RESET

The chiller is shut down because a current module (CM-2 Electro-Mechanical starter application), or the YORK Solid State Starter or the Variable Speed Drive initiated a shutdown. To restart system, reset the ex- ternal device that caused the shutdown. The chiller will then automatically restart.

NOTE: The following motor controller shutdowns do not require an external reset to restart chiller.

Solid State Starter 110°F start inhibit. Anytime the chiller has been shut down for any reason, this mes- sage will be displayed until the SCR heatsink tempera- tures decrease to below 110°F.

MON XX:XX AM – POWER FAULT – AUTOSTART

The chiller is shut down because of a Solid State Starter or current module (CM-2 Electro-Mechanical starter application) “Power Fault” shutdown. The chiller will automatically restart. This function is sensed by the motor controller input to the digital input board. A power- fault shutdown is initiated by the motor controller con- tacts (CM-1) opening and reclosing in one second. If

Solid State Starter application, the shutdown could have been caused by any of the following reasons. The ap- propriate light on the Solid State Starter Logic Board will be illuminated.

•Phase rotation/loss

•Trigger Board out of lock (OOL)

•Power Fault

•Half Phase

MON XX:XX AM – HIGH DISCHARGE TEMP

The chiller is shut down because the discharge tem- perature has increased to 220°F. The system will be allowed to restart when the temperature has decreased to 219°F. Temperature is sensed by a thermistor RT2. To restart the chiller, press COMPRESSOR switch to STOP/RESET position and then to the START posi- tion.

MON XX:XX AM – HIGH OIL TEMP

The chiller is shut down because the oil temperature has increased to 180°F. The system will be allowed to restart when the temperature decreases to 179°F. The temperature is sensed by thermistor RT3. To restart the chiller, press COMPRESSOR switch to STOP/RE- SET position and then to the START position.

MON XX:XX AM – OIL PRESSURE TRANSDUCER

The chiller is shut down because the oil pressure has increased to 125 PSID (during the first 7 minutes of compressor operation) 60 PSID (after the first minutes of compressor operation). The chiller will be allowed to restart when the oil pressure decreases to 59 PSID. To restart the chiller, press COMPRESSOR switch to STOP/RESET position and then to the START posi- tion.

MON XX:XX AM – FAULTY COND PRESSURE XDCR

The chiller is shut down because the condenser trans- ducer is indicating a pressure of less than 24.2 PSIG (R-22), 6.8 PSIG (R-134a); or a pressure greater than 300 PSIG (R-22 or R-134a). This is generally indica- tive of a defective condenser transducer or the trans- ducer has been disconnected. After the problem has been corrected, the chiller can be restarted. To restart, press COMPRESSOR switch to STOP/RESET posi- tion and then to START position.

MON XX:XX AM – FAULTY OIL PRESSURE XDCR

The chiller is shut down because either the high side or low side oil pressure transducer was out-of-range (displaying x’s) while chiller was running. To restart

26 YORK INTERNATIONAL