3153 REAGENT PROBE DETERGENT SHORT System Status (1) When W2 starts The mode changes to WARM-UP or STAND-BY. (2) During W2 Operations continue. Cause (1) The REAGENT detergent is low when W2 starts. User Action (1) When W2 starts Set detergent in sample pre-dilution position. If the probe does not detect detergent, check the function of the level sensor. (2) During W2 Stop operation at once, refill the detergent bottle, and restart W2.