Carrier 38MVC, 38MVQ, 40MVC, 40MVQ CHART 9 -- UNIT NOT RUNNING OPTIMALLY (HP IN HEATING)*

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CHART 9 -- UNIT NOT RUNNING OPTIMALLY (HP IN HEATING)*
Visually check outdoor
Unit for ice blockage. **
Check reversing valve.
Go to flow chart #12
No
Yes
Yes
Check defrost sensor. Ok? No
Replace sensor
Check application limits.
Ok?
** Check for blockage on outdoor coil and drain pan. Are the holes in drain pans blocked?
No Beyond operating range
Yes
Yes
Check ambient conditions.
Prime icing?
Explain to customer
Visually check outdoor
Unit for ice blockage. **
Check reversing valve.
No
Yes
Yes
Check defrost sensor. Ok?
Go to flow chart #2
No
Replace sensor
Check application limits.
Ok?
* To supplement flow chart #8
es in drain pans blocked?
No Beyond operating range
Yes
Yes
Check ambient conditions.
Prime icing?
Explain to customer
A08184
38/40MVC, MVQ