Carrier High Wall Duct Free Split System 38MVC Service Manual page 37

CHART 12 - - REVERSING VALVE
Check RV connection on Check RV connection on
outdoor board. Ok? outdoor board. Ok?
Yes Yes
Check RV output on outdoor Check RV output on outdoor
board. Ok? board. Ok?
Yes Yes
Check RV solenoid. Ok? Check RV solenoid. Ok?
Yes Yes
Replace reversing valve. Replace reversing valve.
CHART 13 - - RECEIVER BOARD
Check wiring and Check wiring and
connection between connection between
receiver and ID board. Ok? receiver and ID board. Ok?
Yes Yes
Check input and output Check input and output
on ID and receiver on ID and receiver
boards. Ok? boards. Ok?
Yes Yes
Replace remote control Replace remote control
No No
Clean or repair the Clean or repair the
connection connection
No No
Replace outdoor board Replace outdoor board
No No
Replace solenoid Replace solenoid
No No
Fix wiring or Fix wiring or
connection connection
No No
Replace receiver board Replace receiver board
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