A refrigeration system comprising: a gas cooler/condenser configured to remove heat from a refrigerant flowing through the gas cooler/condenser and comprising an outlet through which the refrigerant exits the gas cooler/condenser; a fan operable to cause airflow across the gas cooler/condenser and configured to operate at multiple different fan speeds to modulate an amount of heat removed the refrigerant flowing through the gas cooler/condenser; characterized by a controller configured to: calculate a condenser approach temperature by subtracting a temperature of the airflow caused by the fan from a temperature of the refrigerant exiting the gas cooler/condenser; operate the fan to modulate the amount of heat removed from the refrigerant flowing through the gas cooler/condenser to maintain the condenser approach temperature at or below a condenser approach setpoint; and automatically adjust the condenser approach setpoint in response to the amount of heat removed from the refrigerant being insufficient to maintain the condenser approach temperature at or below the condenser approach setpoint; wherein automatically adjusting the condenser approach setpoint includes performing an approach setpoint adjustment process comprising: starting a condenser approach subroutine timer; monitoring the condenser approach temperature and a fan speed of the fan after starting the condenser approach subroutine timer; automatically increasing the condenser approach setpoint to an adjusted condenser approach setpoint in response to the condenser approach temperature and the fan speed failing to maintain predetermined conditions for at least a minimum amount of time before the condenser approach subroutine timer expires; and repeating the starting, monitoring, and automatically increasing steps until the condenser approach temperature and the fan speed maintain the predetermined conditions for at least the minimum amount of time before the condenser approach subroutine timer expires. a gas cooler/condenser configured to remove heat from a refrigerant flowing through the gas cooler/condenser and comprising an outlet through which the refrigerant exits the gas cooler/condenser; a fan operable to cause airflow across the gas cooler/condenser and configured to operate at multiple different fan speeds to modulate an amount of heat removed the refrigerant flowing through the gas cooler/condenser; characterized by a controller configured to: calculate a condenser approach temperature by subtracting a temperature of the airflow caused by the fan from a temperature of the refrigerant exiting the gas cooler/condenser; operate the fan to modulate the amount of heat removed from the refrigerant flowing through the gas cooler/condenser to maintain the condenser approach temperature at or below a condenser approach setpoint; and automatically adjust the condenser approach setpoint in response to the amount of heat removed from the refrigerant being insufficient to maintain the condenser approach temperature at or below the condenser approach setpoint; calculate a condenser approach temperature by subtracting a temperature of the airflow caused by the fan from a temperature of the refrigerant exiting the gas cooler/condenser; operate the fan to modulate the amount of heat removed from the refrigerant flowing through the gas cooler/condenser to maintain the condenser approach temperature at or below a condenser approach setpoint; and automatically adjust the condenser approach setpoint in response to the amount of heat removed from the refrigerant being insufficient to maintain the condenser approach temperature at or below the condenser approach setpoint; wherein automatically adjusting the condenser approach setpoint includes performing an approach setpoint adjustment process comprising: starting a condenser approach subroutine timer; monitoring the condenser approach temperature and a fan speed of the fan after starting the condenser approach subroutine timer; automatically increasing the condenser approach setpoint to an adjusted condenser approach setpoint in response to the condenser approach temperature and the fan speed failing to maintain predetermined conditions for at least a minimum amount of time before the condenser approach subroutine timer expires; and repeating the starting, monitoring, and automatically increasing steps until the condenser approach temperature and the fan speed maintain the predetermined conditions for at least the minimum amount of time before the condenser approach subroutine timer expires. starting a condenser approach subroutine timer; monitoring the condenser approach temperature and a fan speed of the fan after starting the condenser approach subroutine timer; automatically increasing the condenser approach setpoint to an adjusted condenser approach setpoint in response to the condenser approach temperature and the fan speed failing to maintain predetermined conditions for at least a minimum amount of time before the condenser approach subroutine timer expires; and repeating the starting, monitoring, and automatically increasing steps until the condenser approach temperature and the fan speed maintain the predetermined conditions for at least the minimum amount of time before the condenser approach subroutine timer expires.