York YGWH 115 Installation, Commissioning & Operation page 48

Form 6S6I-B01C-EOMA-EN (0318)
Code 121: Safety Fault-SYS1 Compressor Over Current
This safety fault is set when the 1#Percent MLA rises above 100% for 5 seconds, the 1# unit will shut down and the
message will be displayed. This fault has to be manually reset after the 1#Percent MLA falls below 100%.
Code 122: Safety Fault-SYS1 Compressor Low Current
This safety fault is set when the 1#Percent FLA falls below 10% for 10 seconds, the 1# unit will shut down and the
message will be displayed. This fault has to be manually reset after the 1#Percent MLA goes above 10%.
Code 123: Safety Fault-SYS1 Oil Low Diff. Pressure
This safety fault is set if, after 180 seconds of unit run time, the difference of Oil Pressure minus Evaporator Pressure
goes below 100 kPa and lasts for over 15 seconds, the 1# unit will shut down and the message will be displayed.
This fault has to be manually reset after the 1# unit is stopped.
Code 124: Safety Fault-SYS1 Oil Clogged Filter
This safety fault is set if, after 180 seconds of unit run time and the difference of Condenser Pressure minus Oil
Pressure is above the 'Fault Pressure' and lasts for over 15 seconds, the 1# unit will shut down and the message
will be displayed. This fault has to be manually reset after the 1# unit is stopped.
The default value of the 'Fault Pressure' is:
Air-conditioner/Ice-Storage: 245kPa;
Heat Pump: 245kPa, the 'Fault Pressure' becomes 370 kPa when the leaving or return condenser temperature is
above 42 °C, and it does not return to 245 kPa until leaving and return condenser temperature are both below 40 °C.
Code 127: Safety Fault-SYS1 Discharge Low Superheat
This safety fault is set after the unit is running for over 180 seconds, when the Discharge Superheat Temperature
falls below 3°C for over 15 minutes, the 1# unit will shut down and the message will be displayed. This fault has to
be manually reset after the 1#unit is stopped.
Code 128: Safety Fault-SYS1 Motor High Temperature
This safety fault is set when one of the Motor Temperature A, B, C goes above 115°C(121°C for heat pump) for 5
seconds, the 1# unit will shut down and the message will be displayed. This fault has to be manually reset after
all the three phase 1# motor temperatures are less than fault point. If one of the motor temperature is set as
unprotected in the option of Motor Temp Protect Option, it will be ignored by protection logic.
Code 151: Safety Fault-SYS1 Motor Phase A Temp. Sensor Fault
When there is a fault or disconnection in the Motor Phase A Temp. Sensor or connection plug is pulled out, the unit
will shut down and the message will be displayed. This fault has to be manually reset after the sensor recovers. If
one of the motor temperature is set as unprotected in the option of Motor Temp Protect Option, it will be ignored by
protection logic.
Code 152: Safety Fault-SYS1 Motor Phase B Temp. Sensor Fault
When there is a fault or disconnection in the Motor Phase B Temp. Sensor or connection plug is pulled out, the unit
will shut down and the message will be displayed. This fault has to be manually reset after the sensor recovers. If
one of the motor temperature is set as unprotected in the option of Motor Temp Protect Option, it will be ignored by
protection logic.
Code 153: Safety Fault-SYS1 Motor Phase C Temp. Sensor Fault
When there is a fault or disconnection in the Motor Phase C Temp. Sensor or connection plug is pulled out, the unit
will shut down and the message will be displayed. This fault has to be manually reset after the sensor recovers. If
one of the motor temperature is set as unprotected in the option of Motor Temp Protect Option, it will be ignored by
protection logic.
8-4 EN