Carrier High Wall Duct Free Split System 38MVC Service Manual page 28

CHART 3 - - COMPRESSOR OVERCURRENT PROTECTION
No No
Replace compressor Replace compressor
Is unit running in outdoor Is unit running in outdoor
ambient higher than ambient higher than
125 °F? 125 °F?
No No
No No
Outdoor coil clean? Outdoor coil clean?
Yes Yes
Check connections from Check connections from Yes Yes
OD board. Corrosion, or OD board. Corrosion, or
high resistance high resistance
No No
No No
Outdoor fan Ok? Outdoor fan Ok?
Yes Yes
No No
Connect gauges to unit. Connect gauges to unit.
pressures ok? pressures ok?
Yes Yes
Check amp draw to Check amp draw to
compressor? Values within compressor? Values within
range? range?
Yes Yes
Replace outdoor board Replace outdoor board
Beyond operating range Beyond operating range
No No
Clean coil. Clean coil.
Problem persists? Problem persists?
Yes Yes
No No
Clean/repair connection Clean/repair connection
Problem persists? Problem persists?
Yes Yes
Change outdoor motor Change outdoor motor
No No
High head, high suction? High head, high suction?
Yes Yes
Unit is overcharged. Unit is overcharged.
Reclaim charge and weigh Reclaim charge and weigh
in correct charge. in correct charge.
28
Problem solved Problem solved
Problem solved Problem solved
High head, low suction? High head, low suction?
Yes Yes
Restriction in refrigeration Restriction in refrigeration
circuit. circuit.
A08168