1302
(UE)
Highpressuretrouble
●Diagnosisofdefectives
MakesuretoturnthepowerOFFbeforeconnecting/disconnectinganyconnectors,orreplacingboards.
Diagnosis Remedy
Chart 2 of 4
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
Istheindoorunitlterclogged? Cleanthelter.
(Cloggedlter)
(No clog)
Continuedfromthepreviouspage
Is there dirt on the indoor heat
exchanger?
Is the outdoor unit short-cycled?
Is there dirt on the outdoor heat
exchanger?
Arethepipescloggedorbroken?
Washtheindoorheatexchanger.
Solve the short cycle.
Washtheoutdoorheatexchanger.
Correctdefectivepipes
(dirty)
(dirty)
(short-cycled)
(no dirt)
(no dirt)
(no short-cycle)
Continuetothenextpage
DisconnecttheTH7wiringandcheckthe
resistance.
54