York YCAL Series Installation Operation & Maintenance page 156

SECTION 9 - SERVICE AND TROUBLESHOOTING
TABLE 32 – TROUBLESHOOTING (CONT'D)
PROBLEM
LACK OF COOLING EFFECT
156
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 150.66-NM3
ISSUE DATE: 09/25/2020
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