Carrier High Wall Duct Free Split System 38MVC Service Manual page 30

No No
Outdoor coil clean? Outdoor coil clean?
Yes Yes
Check outdoor unit Check outdoor unit
Yes Yes
board. Indicator light board. Indicator light
flashing twice? flashing twice?
No No
Connect gauges to Connect gauges to Yes Yes
unit. Pressures ok? unit. Pressures ok?
No No
No No
Suction and head Suction and head
equal? equal?
Yes Yes
Check compressor Check compressor
* Restriction in system. Check capillary tube, check for moisture, and check for damage to liquid line between indoor and * Restriction in system. Check capillary tube, check for moisture, and check for damage to liquid line between indoor and
outdoor units. outdoor units.
CHART 5 - - OUTDOOR UNIT PROTECTS
Clean coil. Problem Clean coil. Problem No No
persists? persists?
Yes Yes
Check sensors. Check sensors.
Flow Chart #2 Flow Chart #2
Check application Check application
limits limits
No No
Normal suction, Normal suction,
high head? high head?
Yes Yes
Non condensables Non condensables
in sys. Pump down in sys. Pump down
and recharge unit and recharge unit
Problem solved Problem solved
No No
High head, high High head, high
suction? suction?
Yes Yes
Unit is overcharged. Unit is overcharged.
Reclaim charge and Reclaim charge and
weigh in correct charge weigh in correct charge
30
High head, low High head, low
suction? suction?
Yes Yes
* *
See note below See note below
A08182