Reznor YDHA - Page 45

Form O-Y P/N 273647R5, Page 45
Compressor Digital Controller LED’s
7.2 Troubleshooting Compressor Digital Controller
General - The digital controller is located in the electrical compartment and acts as the interface between the digital
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&RPSUHVVRU)DLOXUHFKHFNWKH/('OLJKWVRQWKHGLJLWDOFRQWUROOHU
7KHDOHUWFRGHUHG/('ÀDVKHVRQWKHGLJLWDOFRQWUROOHUUHPDLQVDFWLYHDQGWKHFRPSUHVVRUGHHQHUJL]HGXQWLOWKH
UHVHWFRQGLWLRQVKDYHEHHQPHWRUWKH9$&SRZHULVF\FOHGRIIDQGRQ$OO&RGHVH[FHSWÀDVKHVUHVXOWLQFRP-
pressor (contactor and unloader valve) being de-energized.
LED State
Indicates Additional Information
Color CODE
Green Solid 3RZHU9$&SUHVHQWDW
power terminals)
Modulating capacity compressor starts only when
GHPDQGVLJQDOLQSXWLVDERYH9'&DQGQR
$/(576UHG/('ÀDVKHVDUHDFWLYH
Green. Flashing Anti-short cycle timer is
active
Yellow Solid Unloader (Solenoid valve
LVHQHUJL]HGFRPSUHVVRU
capacity is 0.)
Modulating capacity compressor always unloads for 0.1
second at startup.
Red Not lit No abnormal operation
alerts
Red 2 Flashes High Discharge
Temperature Alert
(thermistor temperature
above 268°F or
thermistor is short
circuited)
Modulating capacity compressor will be allowed to
restart after a 30-minute delay and after the thermistor
WHPSHUDWXUHLVEHORZ)&RPSUHVVRUZLOOORFNRXW
after 5 alerts within 4 hours and can only be reset by
F\FOLQJWKH9$&SRZHURIIDQGRQ
Red 3 Flashes &RPSUHVVRU3URWHFWRU
Trip (demand signal
!9'&QR
compressor current)
Possible causes - internal overload, fuse or breaker,
compressor wiring. After 2-minute anti-short cycle timer
the controller will attempt to restart the compressor as
ORQJDVGHPDQGLVDERYH9'&1RORFNRXWIHDWXUH
Red 4 Flashes /RFNHG5RWRU$OHUW /RFNHGURWRUVHQVHGE\FRQWUROOHURQIRXUFRQVHFX-
WLYHVWDUWXSV/RFNRXWRFFXUVDQGFDQRQO\EHUHVHWE\
F\FOLQJ9$&SRZHURIIDQGRQ
Red 5 Flashes 'HPDQG6LJQDO/RVV
EHORZ9'&
:KHQGHPDQGVLJQDOLQSXWULVHVDERYH9'&DODUP
FRGHZLOOUHVHW:KHQGHPDQGUHDFKHVDERYH9'&
and anti-short cycle timer has timed out, modulating
capacity compressor will restart.
Red 6 Flashes Discharge Thermistor
Fault (no signal being
received)
0RGXODWLQJFRPSUHVVRUFDSDFLW\OLPLWHGWR
Re-connect or replace thermistor.
Red 7 Flashes 8QORDGHU6ROHQRLG9DOYH
Fault
Red 8 Flashes &RPSUHVVRU&RQWDFWRU
Fault (compressor
running on less than
9'&GHPDQGVLJQDO
Modulating compressor will run unloaded. Alarm will be
reset when current is no longer detected while system
GHPDQGVLJQDOLVEHORZ9'&
Red 9 Flashes /RZ9$&VXSSO\
to controller (below
9$&
Alarm will reset when supply voltage to controller rises
DERYH9$&