What does low mchc means?

Low hemoglobin/RBC. This simply means there is a low mean corpuscular hemoglobin concentration (mchc), or a low average amount of hemoglobin for each red blood cell. It is a measure of the concentration of hemoglobin in a given volume of packed red blood cells. Mchc is low in microcytic anemias, like iron deficiency anemia, and thalassemia.
Low MCHC. Low mean corpuscular hemoglobin concentration (MCHC) can be seen in iron deficiency anemia and thalassemia. It can also be falsely abnormal if the patient had a very high glucose (sugar) level when the sample was drawn.