York YGWH 115 Installation, Commissioning & Operation page 51

Form 6S6I-B01C-EOMA-EN (0318)
Code 513: Warning-SYS1 Discharge Low Superheat Stop Load
This warning is set after the 1# compressor is running over 180 seconds, whenever the 1# discharge superheat is
less than Setpoint (default: 3°C), the unit will stop load, level control EEV will be force close and the message will
be displayed. This warning releases, capacity and EEV is recovered to automatic control after the 1# discharge
superheat is larger than Setpoint + 1°C.
Code 514: Warning-SYS1 Discharge Low Superheat Force Unload
This warning is set after the 1# compressor is running over 180 seconds, whenever the 1# discharge superheat is
less than Setpoint (default: 3°C) and lasts for 120 seconds, the unit will force unload, level control EEV will be force
close and the message will be displayed. This warning releases, capacity and EEV is recovered to automatic control
after the 1# discharge superheat is larger than Setpoint + 1°C.
Code 515: Warning-SYS1 Oil Low Diff. Pressure Close EEV
This warning is set after the 1# compressor is running over 60 seconds, whenever the 1#Oil Pressure minus the
Evaporator Pressure is less than 100kPa, and the Evaporator Pressure is above 300kPa, the level control EEV will
be force close and the message will be displayed. This warning releases and EEV is recovered to automatic control
after the 1#Oil Pressure minus the Evaporator Pressure is larger than 150 kPa or the Evaporator Pressure is less
than 280 kPa.
Code 516: Warning-SYS1 Compressor Over Current Stop Load Force Unload
This warning is set after the 1# compressor is running, whenever the 1#Motor current is larger than the MLA
multiplied by 'Over Current Percent-5%', the unit will stop load; whenever the 1#Motor current is larger than the MLA
multiplied by 'Over Current Percent-4%', the unit will force unload by the middle level pulse; whenever the 1#Motor
current is larger than the MLA multiplied by 'Over Current Percent-3%', the unit will force unload continuously.
This message will be displayed if any of the unit stop load or force unload happens. This warning releases and
capacity is recovered to automatic control after the 1#Motor current is less than the MLA multiplied by 'Over Current
Percent-5%'.
Code 517: Warning-SYS1 Compressor Minimum Force Load
This warning is set after the 1# compressor is running over 180 seconds, whenever the 1# motor current is less than
the MLA multiplied by the 'Minimum Load Percent', the unit will force load and the message will be displayed. This
warning releases and capacity is recovered to automatic control after the 1# motor current is larger than the MLA
multiplied by the 'Minimum Load Percent'. (Only applicable to constant driver unit)
Code 518: Info-SYS1 Compressor Minimum Run Time Protect
The compressor can't response to the temperature cycling stop request if it has been running less than the 'Minimum
Run Time', and this information will be displayed on the status bar. This message will be released automatically after
the unit has been running over the 'Minimum Run Time', or if the leaving temperature has not reached the stop point.
Code 519: Warning-SYS1 Motor High Temperature Force Unload
This warning is set after the 1# compressor is running, whenever one of the 1#Motor Temperature A, B, C is larger
than the 'LICO Open Dischar. Temp. Setpoint + 5°C', and the motor current is higher than the MLA multiplied by
80%, the unit will force unload and the message will be displayed. This warning releases and capacity is recovered
to automatic control after all the three phase 1# motor temperatures are lower than the 'LICO Open Dischar. Temp.
Setpoint'.
The default value of 'LICO Open Dischar. Temp. Setpoint' is as below:
Air-conditioner/Ice-Storage: 95°C;
Heat Pump: 100°C.
Code 520: Warning-SYS1 Motor High Temperature Force Load
This warning is set after the 1# compressor is running, whenever one of the 1#Motor Temperature A, B, C is larger
than the 'LICO Open Dischar. Temp. Setpoint + 5°C', and the motor current is lower than the MLA multiplied by
65%, the unit will force load and the message will be displayed. This warning releases and capacity is recovered
to automatic control after all the three phase 1# motor temperatures are lower than the 'LICO Open Dischar. Temp.
Setpoint'.
EN
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