Carrier Weathermaster 48P030-100 Controls, Start-Up, Operation, Service, And Troubleshooting page 45

System Mode = No
OFF?
System
Yes
Mode
No
Inputs -> FIRE -> HVAC Mode = OFF
FSD in alarm?
Yes
HVAC Mode = OFF
(Fire Shutdown)
Exceptions
Config->UNIT->
C.TYP changed
while unit running?
Yes
15-second delay
HVAC Mode = OFF
(Disabled)
Config->SP-> SP.CF
= 1 OR 2
and static pressure
sensor has failed
HVAC Mode = OFF
(Static Pres. Fail)
Unit control free to select
normal heating/cooling
HVAC mode
Unit
control free
to choose
HVAC
Mode
(Disabled)
System Mode =
No
TEST?
Yes
HVAC Mode = TEST
Config->UNIT->
SFS.M=1 OR 2 AND
No
Config->UNIT->
SFS.S=YES?
and supply fan
has failed
Yes Yes
HVAC Mode = OFF
(Fan Status Fail)
HVAC Mode = OFF
HVAC Mode =
Tempering Vent
HVAC Mode =
Tempering LoCool
HVAC Mode =
Tempering HiCool
HVAC Mode = Venting
Dehumidification
HVAC Mode =
Cooling Dehumidification
HVAC Mode =
Heating Dehumidification
Fig. 3 — Mode Selection
Unit not in factory
test AND fire-smoke
control mode is
Fire- alarming?
Smoke
Yes
Control
No
Inputs -> FIRE ->
PRES in alarm?
Yes
HVAC Mode = OFF
(Pressurization)
No
Service Test ->
No
S.STP = YES?
Yes
HVAC Mode = SoftStop
Request
Config->BP->
BP.CF=5 AND
No No
Unit just waking up
There is a plenum
from power reset?
pressure switch
error
Yes
HVAC Mode = OFF HVAC Mode = OFF
(Plenum Pressure Trip) (Starting Up)
HVAC Mode = Vent
HVAC Mode = Low Cool
HVAC Mode = High Cool
HVAC Mode = Low Heat
HVAC Mode = High Heat
HVAC Mode = Unocc.
Free Cool
45
No
No
Inputs -> FIRE ->
EVAC in alarm?
Yes
HVAC Mode = OFF HVAC Mode = OFF
(Evacuation) (Purge)
(Config->HEAT->
Config->UNIT->
HT.TY=4 OR Config->
No
RM.CF =2 AND
DEHU->D.SEL=1) AND
Inputs->GEN.I->
(Inputs ->GEN.I->
REMT = ON FRZ.S=ALRM?)
Yes Yes
HVAC Mode = OFF HVAC Mode = Freeze
(Rem. Sw. Disable) Stat Trip
No
Unit shutting down?
Yes Yes
HVAC Mode = Shutting
Down
No
Compressor
No No
contactor welded
on?
Yes
HVAC Mode = Comp.
Stuck On