York YCAL0019 Installation, Operation And Maintenance Manual page 214

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