FORM 100.50-NOM7 (808)
81
JOHNSON CONTROLS
6
FAULT TITLE
RDU’s HISTORY
BUFFER
SET WHEN
RESET WHEN
SHUT
DOWN
(1)
GENERAL
STATUS
ADDITIONAL ACTIONS
or DISPLAYS
(3) (4)
TROUBLE ALARM
Excess Duct Pressure
The unit is programmed for VAV
operation AND the Duct Static Pressure
is greater that the Duct Pressure Limit
setpoint.
Cycle power on controller.
*(5)
*
––
Sup Fan Fault
Supply Fan has to be running for 60
seconds AND Air Proving Switch has
not closed for 30 seconds.
Cycle power on controller.
*
*
––
COR Status Fault
COR (Change Over Relay) is
ENERGIZED (cooling requested) and
COR Status input is NOT PRESENT, or
COR is ENERGIZED and COR input is
NOT PRESENT.
Cycle power on controller.
*
*
––
Duct Sensor Fault
Unit programmed for VAV and Duct
static pressure sensor is not reliable
(open or shorted).
Cycle power on controller.
*
*
––
HW Freeze Fault
HW Freezestat parameter programmed
ON AND HW Freezestat Input is
OPEN for 10 minutes.
HW Freezestat Tstat closes
for 5 minutes.
*(6)
*
HW valve = 100% open.
Sys X Sfty Lockout #1
or
Sys X Sfty Lockout #2
Three Comp Safety Trips within one
hour.
Cycle power on controller
OR the corresponding
Compressor. Safety Trip
Closes for 60 min.
*(7)
*
––
SAT Sensor Fault
SAT sensor is not reliable.
SAT sensor is not reliable.
*
*
OpData/Supply Air Temp/Temp
= ???
Thermostat Conflict
{Y1 OR Y2 = ON} AND {W1 OR W2
= ON}
{(Y1 OR Y2 = ON) AND NOT
(W1 OR W2 = ON)} OR {Y1
AND Y2 AND W1 AND W2
= OFF}
*
*
––
MSAT Sensor Fault
Mixed Supply Air Temp input is
unreliable.
Mixed Supply Air Temp is
reliable.
*
*
––
Sys X Safety Trip
>= 30 sec since a compressor in a
given system was activated AND
the corresponding ‘Compressor
System Status input’ = OFF for 30 sec.
>= 10 minutes since fault
was set
* (8)
(9)
*
––
Evap Freeze Fault
Not used on Millenniums
Space Sensor Fault
Space Sensor Enable = ON AND
‘Space Sensor input’ is unreliable.
‘Space Sensor input’ is
reliable OR Space Sensor
Enable’ = OFF.
*(12)
*
‘OpData/Space Temperature/
Temp’ = ???
VAV Mode Only
Unit Controlled in ‘Stand Alone
Control’.
High Press Unload x
[ 1, 2 or 3]
Unit programmed for transducer
package AND both compressors are
ON in a given system AND ‘Discharge
Pressure is less than the Sys Unloading
Setpoint.
{OAT < (OAT @ unload
– 5F)} OR {Cycle power on
controller}.
*
Destage the compressor in
corresponding system with the
most run time.
TABLE 19 - FAULT DESCRIPTIONS TABLE (Continued)
Summary of Contents for J Series
Page 85: ...FORM 100 50 NOM7 808 85 JOHNSON CONTROLS 6 ELECTRICAL NOTES AND LEGEND LD13862 ...
Page 87: ...FORM 100 50 NOM7 808 87 JOHNSON CONTROLS 6 LD13864 ...
Page 88: ...JOHNSON CONTROLS 88 FORM 100 50 NOM7 808 Service OPTI CONVERSION TO 25 40 TON LD13854 ...
Page 89: ...FORM 100 50 NOM7 808 89 JOHNSON CONTROLS 6 LD13865 ELEMENTARY DIAGRAM ALL UNITS ...
Page 91: ...FORM 100 50 NOM7 808 91 JOHNSON CONTROLS 6 ELEMENTARY DIAGRAM GAS HEAT 25 40 TON 575V LD13861 ...
