Symptom:
WATER CYCLE VALVE CON TROL HIGH OR OP EN (ACTIVE)
POSSIBLE CAUSES
WATE R CYCLE VALVE
WATE R CYCLE VALVE CONTROL CIRCUIT SH ORTED TO VOLTAGE
AUTOMATIC TE MPE RATURE CONTROL (ATC)
WATE R CYCLE VALVE CONTROL CIRCUIT OP E N
GROU ND CI RCUI T OP E N
AUTOMATIC TE MPE RATURE CONTROL (ATC)
TE S T ACTION AP PLICAB ILITY
1 Tur n th e ign it ion off.
Pr ess t h e Residu a l E n gin e Hea t Ut iliza t ion (RE ST) swit ch off.
NOTE: Ch e c k c o n n e c to rs - Cle an /re pa i r a s n e c e ss a ry.
Discon n ect t he Wa t er Cycle Valve ha r n ess con n ect or.
Con n ect a 12-volt t est ligh t bet ween t h e Wat er Cycle Va lve Con t r ol cir cu it a nd th e
Gr ou n d cir cu it in t h e Water Cycle Va lve h a r n ess con n ect or. Th e t est ligh t sh ou ld
oper a t e as follows:
Wit h t h e Residu a l E n gin e H ea t Utiliza tion (RE ST) swit ch off, th e t est ligh t sh ou ld
not illu m in a t e.
Pr ess t h e Residu a l E n gin e Hea t Ut iliza t ion (RE ST) swit ch on.
Wit h th e Blen d con t r ol set to F u ll Cold, th e t est ligh t sh ou ld illu m in a t e br igh t ly a n d
cont in uou sly.
Wit h t h e Blen d con t r ol set t o one posit ion below t h e h a lf Cold/H ot set t in g, th e t est
ligh t sh ou ld illu m in a t e br igh t ly a n d blink at a slow con t in u ou s ra t e.
Wit h t h e Blen d con t r ol set t o t he h a lf Cold/H ot set t in g or above, th e t est ligh t sh ou ld
be off.
Does t h e test ligh t oper a t e as specified?
All
Ye s → Repla ce t h e Wat er Cycle Valve in a ccor da n ce wit h t h e Ser vice
In for m a t ion .
Per for m BODY VERIFICATION TE ST - VE R 1.
No, Ligh t Illu m in a t es Wit h RE ST Off.
Go To 2
No, Ligh t Will N ot Illu m in a t e
Go To 3
No, Ligh t Won’t Cor respon d To Blen d
Go To 3
175
HEAT IN G & A/C
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