Bryant R-22 Especificaciones descargar pdf (Pagina 35)

SSP-SVX15C-EN

System Failure

Check the voltage between terminals 6 and 9 on J6, it

should read approximately 32 VDC. If no voltage is

present, a System failure has occurred. Refer to Step 4

in the previous section for the recommended

troubleshooting procedure.

Cooling Failure

1. Cooling and heating set point (slide pot) on the

zone sensor has failed. Refer to the ”Programmable

& Digital Zone Sensor Test”, p. 37.

2. Zone temperature thermistor ZTEMP on ZTS failed.

Refer to the ”Programmable & Digital Zone Sensor

Test”, p. 37.

3. CC1 or CC2 24 VAC control circuit has opened,

check CC1 & CC2 coils, and any of the controls

below that apply to the unit (HPC1, HPC2, DTL1,

DTL2).

4. LPC1 has opened during the 3 minute minimum “on

time” during 4 consecutive compressor starts,

check LPC1 or LPC2 by testing voltage between the

J1-8 & J3-2 terminals on the RTRM and ground. If

24 VAC is present, the LPCs have not tripped. If no

voltage is present, LPCs have tripped.

Simultaneous Heat and Cool Failure

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• Emergency Stop is activated.

Method 2

The second method for determining system status is

done by checking voltage readings at the RTRM (J6).

The system indication descriptions and the

approximate voltages are listed below.

System Failure

Measure the voltage between terminals J6-9 & J6-6.

• NNoorrmmaall OOppeerraattiioonn = approximately 32 VDC

• SSyysstteemm FFaaiilluurree = less than 1 VDC, approximately

0.75 VDC

• TTeesstt MMooddee = voltage alternates between 32 VDC &

0.75 VDC

Heat Failure

Measure the voltage between terminals J6-7 & J6-6.

• HHeeaatt OOppeerraattiinngg = approximately 32 VDC

• HHeeaatt OOffff = less than 1 VDC, approximately 0.75 VDC

• HHeeaattiinngg FFaaiilluurree = voltage alternates between 32

VDC & 0.75 VDC

Cool Failure

Measure the voltage between terminals J6-8 & J6-6.

• CCooooll OOppeerraattiinngg = approximately 32 VDC

• CCooooll OOffff = less than 1 VDC, approximately 0.75 VDC

• CCoooolliinngg FFaaiilluurree = voltage alternates between 32

VDC & 0.75 VDC

To use LED’s for quick status information at the unit,

purchase a BAYSENS010B ZSM and connect wires with

alligator clamps to terminals 6 through 10. Connected

each respective terminal wire (6 through 10) from the

Zone Sensor to the unit J6 terminals 6 through 10.

NNoottee:: If the system is equipped with a programmable

zone sensor, (BAYSENS119A, or BAYSENS023A),

the LED indicators will not function while the

BAYSENS010A is connected.

Resetting Cooling and Heating

Lockouts

Cooling Failures and Heating Lockouts are reset in an

identical manner.”Method 1”, p. 35 explains resetting

the system from the space; ”Method 2”, p. 35 explains

resetting the system at the unit.

NNoottee:: Before resetting Cooling Failures and Heating

Lockouts check the Failure Status Diagnostics by

the methods previously explained. Diagnostics

will be lost when the power to the unit is

disconnected.

Method 1

To reset the system from the space, turn the MMOODDEE

selection switch at the zone sensor to the OOFFFF position.

After approximately 30 seconds, turn the MMOODDEE

selection switch to the desired mode, i.e. HHEEAATT, CCOOOOLL,

or AAUUTTOO.

Method 2

To reset the system at the unit, cycle the unit power by

turning the disconnect switch OOFFFF and then OONN

Lockouts can be cleared through the building

management system. Refer to the building

management system instructions for more

information.

Zone Temperature Sensor (ZTS)

Service Indicator

The ZSM SERVICE LED is a generic indicator that will

signal the closing of a Normally Open switch at any

time, providing the Indoor Motor (IDM) is operating.

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