Service Test; General - Carrier WeatherMaker 48A2020 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

SERVICE TEST

General

The units are equipped with a Service Test feature, which is in-
tended to allow a service person to force the unit into different
modes of operation to test them. To use this feature, enter the
Service Test category on the local display and place the unit
into the test mode by changing Service Test
OFF to ON. The display will prompt for the password before
allowing any change. The default password is 1111. Once the
unit enters the Service Test mode, the unit will shut down all
current modes.
TEST
The TEST command turns the unit off (hard stop) and allows
the unit to be put in a manual control mode.
STOP
The STOP command completely disables the unit (all outputs
turn off immediately). Once in this mode, nothing can override
the unit to turn it on. The controller will ignore all inputs and
commands.
ITEM
TEST Service Test Mode
STOP Local Machine Disable
S.STP Soft Stop Request
FAN.F Supply Fan Request
F.4.CH 4 in. Filter Change Mode
INDP TEST INDEPENDENT OUTPUTS
ECN.C Economizer Act.Cmd.Pos.
E.PWR Economizer Power Test
E.CAL Calibrate the Economizer?
PE.A Power Exhaust Relay A
PE.B Power Exhaust Relay B
PE.C Power Exhaust Relay C
H.I.R Heat Interlock Relay
ALRM Remote Alarm/Aux Relay
FANS TEST FANS
S.FAN Supply Fan Relay
S.VFD Supply Fan VFD Speed
CD.F.A Condenser Fan Circuit A
CD.F.B Condenser Fan Circuit B
A.VFD MtrMaster A Commanded %
B.VFD MtrMaster B Commanded %
MMF.A MtrMaster Fan Circuit A
MMF.B MtrMaster Fan Circuit B
OV.A Outdoor Fan VFD A Control Cmd %
OV.B Outdoor Fan VFD B Control Cmd %
COOL TEST COOLING
A1 Compressor A1 Relay
A2 Compressor A2 Relay
MLV Min. Load Valve (HGBP)
DS.CP Digital Scroll Capacity
B1 Compressor B1 Relay
B2 Compressor B2 Relay
RHV Humidimizer 3-Way Valve
C.EXV Condenser EXV Position
B.EXV Bypass EXV Position
HEAT TEST HEATING
HT.ST Requested Heat Stage
HT.1 Heat Relay 1
HT.2 Heat Relay 2
HT.3 Relay 3 W1 Gas Valve 2
HT.4 Relay 4 W2 Gas Valve 2
HT.5 Relay 5 W1 Gas Valve 3
HT.6 Relay 6 W2 Gas Valve 3
HMZR TEST HUMIDI-MIZER
RHV Humidimizer 3-Way Valve
C.EXV Condenser EXV Position
B.EXV Bypass EXV Position
C.CAL Condenser EXV Calibrate
B.CAL Bypass EXV Calibrate
 
TEST from
Table 30 — Service Test
EXPANSION
S.STP
Setting Soft Stop to YES turns the unit off in an orderly way,
honoring any time guards currently in effect.
FAN.F
By turning the FAN FORCE on, the supply fan is turned on and
will operate as it normally would, controlling duct static pres-
sure on VAV applications or just energizing the fan on CV ap-
plications. To remove the force, press ENTER and then press
the UP and DOWN arrows simultaneously.
F.4.CH
The 4-Inch Filter Change Mode variable is used to service the
unit when 4-in. filters are used. When the filters need to be
changed, set Service Test
placed in Service Test mode and the economizer will move to
the 40% open position to facilitate removal of the 4-in. filters.
After the filters have been changed, set Service Test
= NO to return the unit to normal operation.
The remaining categories: INDP, FANS, COOL HEAT, and
HMZR are sub-modes with separate items and functions. See
Table 30.
RANGE UNITS
ON/OFF
YES/NO
YES/NO
YES/NO
YES/NO
ON/OFF
ON/OFF
ON/OFF
0 to 100 %
ON/OFF
ON/OFF
0 to 100 %
0 to 100 %
ON/OFF
ON/OFF
0 to 100 %
0 to 100 %
ON/OFF
ON/OFF
ON/OFF
20 to 100 %
ON/OFF
ON/OFF
ON/OFF
0 to 100 %
0 to 100 %
0 to MAX
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
0 to 100 %
0 to 100 %
ON/OFF
ON/OFF
23

F.4.CH = YES. The unit will be

POINT WRITE STATUS
MAN_CTRL
UNITSTOP config
SOFTSTOP forcible
SFANFORC forcible
FILT4CHG
ECONCTST
ECONPTST
ECON_CAL
PE_A_TST
PE_B_TST
PE_C_TST
HIR_TST
ALRM_TST
SFAN_TST
SGVFDTST
CNDA_TST
CNDB_TST
OAVFDTST
OBVFDTST
MM A TST
MM B TST
OV_A_TST
OV_B_TST
CMPA1TST
CMPA2TST
MLV_TST
DSCAPTST
CMPB1TST
CMPB2TST
RHVH_TST
CEXVHTST
BEXVHTST
HTST_TST
HS1_TST
HS2_TST
HS3_TST
HS4_TST
HS5_TST
HS6_TST
RHVH_TST
CEXVHTST
BEXVHTST
CEXV_CAL
BEXV_CAL
F.4.CH