JOHNSON CONTROLS
214
FORM 150.67-NM1
ISSUE DATE: 4/28/2017
SECTION 9 – SERVICE AND TROUBLESHOOTING
TROUBLESHOOTING (CONT’D)
TABLE 37 - TROUBLESHOOTING
PROBLEM CAUSE SOLUTION
LACK OF COOLING EFFECT
1. Fouled evaporator surface. Low
suction pressure will be observed.
1. Contact the local Johnson
Controls Service representative.
2. Improper ow through the evaporator. 2. Reduce ow to within chiller
design specs. See Limitations in
Installation section.
3. Low refrigerant charge. Low suction
pressure will be observed.
3. Check subcooling and add
charge as needed.
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