Cycling Stops - York YGWH 115 Installation, Commissioning & Operation

Form 6S6I-B01C-EOMA-EN (0318)
Code 161: Safety Fault-Emergency Stop Pressed
When the emergency stop button on the panel is pressed, the power of IO board will be cut off, but the power of
HMI and maiboard will continue and the message will be displayed in the status bar. This fault has to be manually
reset after the unit is stopped.
Code 162: Start Inhibit-Oil Heat Over 5 Hour Before Start
This start inhibit is set if the oil heater works no more than 5 hours after the unit has been stopped for over 15 days,
the message will be displayed in the status bar and prevent the unit to start. After continuously oil heating for over
5 hours, this message will be released automatically. This safety fault is not applicable if the Oil Heater is disabled.
Code 163: Safety Fault-Evaporator Smart Freeze Protection
This safety fault is set whenever the evaporator saturation temperature is presently below the freeze threshold, and
the total number of seconds that the evaporator saturation temperature was below the freeze threshold is greater
than the number of seconds to freezing. It is released when either the present evaporator saturation temperature rises
above or equal to the freeze threshold, or the total number of seconds that the evaporator saturation temperature
was below the freeze threshold is less than or equal to the number of seconds to freezing, and the 'Clear Fault'
button is pressed on the History Screen. This fault is only applicable if Smart Freeze Point Protection is active.
Code 299: Communication Error
This is a warning display on HMI, but not for mainboard. When HMI lose communication with mainboard, the
warning will display on the status bar, and it clears automatically when communication is OK.

Cycling Stops

Code 601: Cycling Stop-Chilled Liquid Flow Switch Open
This cycling stop is checked 20 seconds after the Liquid Pump is running. It is set whenever the Chilled Liquid Flow
Switch (DI1) is open for 5 seconds or more, the unit will stop and the message will be displayed. The cycling stop is
released whenever the Chilled Liquid Flow Switch closes and the unit will cycling start automatically.
Code 602: Cycling Stop-Condenser Liquid Flow Switch Open
This cycling stop is checked 20 seconds after the Liquid Pump is running. It is set whenever the Condenser Liquid
Flow Switch (DI11) is open for 5 seconds or more, the unit will stop and the message will be displayed. The cycling
stop is released whenever the Condenser Liquid Flow Switch closes and the unit will cycling start automatically.
Code 618: Cycling Stop-SYS1 Discharge High Temp.
Refer to the description of 'Code 120: Safety Fault-SYS1 Discharge High Temp.'.
Code 621: Cycling Stop-Leaving Condenser High Temperature
If the running mode is set as Air-conditioner, this cycling stop is set when Leaving Condenser Temperature is equal
or higher than the 'High Temp. Stop Setpoint', the unit will stop and the message will be displayed. It is released
when the Leaving Condenser Temperature goes below the 'High Temp. Stop Setpoint'-10°C and the unit will cycling
start automatically.
Code 622: Cycling Stop-Leaving Chilled Liquid Low Temperature
This cycling stop is set when Leaving Chilled Temperature is equal or lower than the 'Low Temp. Stop Setpoint', the
unit will stop and the message will be displayed. It is released when the Leaving Chilled Temperature goes above
the 'Low Temp. Stop Setpoint'+10°C and the unit will cycling start automatically.
Code 625: Cycling Stop-SYS1 Anti-Recycle
This cycling stop is set when the stopped time of the compressor is less than the 'Anti-Recycle Time' (default:
480s), or if the compressor has started to run for over 4 times during last one hour. This cycling stop is cleared
automatically when the stopped time of the compressor is more than the 'Anti-Recycle Time' (default: 480s) and
the compressor has started to run for less than 4 times during last one hour. The compressor is not allowed to start
again until this cycling stop is released.
Code 628: Cycling Stop-Leaving Hot Liquid High Temperature
If the running mode is set as Heat-Pump, this cycling stop is set when Leaving Hot Liquid Temperature is equal or
higher than the 'High Temp. Stop Setpoint', the unit will stop and the message will be displayed. It is released when
the Leaving Hot Liquid Temperature goes below the 'High Temp. Stop Setpoint'-10°C and the unit will cycling start
automatically.
EN
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