| An air-cooled refrigerated container unit using R-134a as a refrigerant has a box temperature setpoint of -15 °F, but it is currently operating with a stable return air temperature of 0 °F. The fresh air makeup vent is closed, the unit is operating at 460 VAC/60 Hz, and the unit is in full capacity cool (modulating valve 100% open). Using the illustrated troubleshooting guide, if the ambient air temperature is 80 °F, what statement is true concerning the operating suction pressure if it is currently 4 psig? |
| A) The suction pressure is within the normal expected range for this ambient temperature. |
| B) The suction pressure is lower than it should be for this ambient temperature. |
| C) The suction pressure is higher than it should be for this ambient temperature. |
| D) Not enough information is given to determine whether the suction pressure is low, normal, or high for this ambient temperature. |
