Conair VL Series - Manual (Page 21)

Page: 21 UGH020/0301 VL Series Portable Chillers, 0.25 to 1.5 Tons
C. Restriction to refrigerant flow in refrigeration circuit.
D. Poor heat transfer in evaporator tank because (1) percentage of
glycol to water is too high and (2) scaled tubes in evaporator tank
(chemically descale).
E. Low flow through evaporator tank due to (1) process flow restricted
or (2) glycol foaming.