50
RT-SVX25C-EN
Troubleshooting
Service Failure
1.
If the supply fan proving switch has closed, the unit will not operate (when connected to RTOM),
check the fan motor, belts, and proving switch.
2. Clogged filter switch has closed, check the filters.
Simultaneous Heat and Cool Failure
1.
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.
•
Normal Operation = approximately 32 VDC
•
System Failure = less than 1 VDC, approximately 0.75 VDC
•
Test Mode = voltage alternates between 32 VDC & 0.75 VDC
Heat Failure
Measure the voltage between terminals J6-7 & J6-6.
•
Heat Operating = approximately 32 VDC
•
Heat Off = less than 1 VDC, approximately 0.75 VDC
•
Heating Failure = voltage alternates between 32 VDC & 0.75 VDC
Cool Failure
Measure the voltage between terminals J6-8 & J6-6.
•
Cool Operating = approximately 32 VDC
•
Cool Off = less than 1 VDC, approximately 0.75 VDC
•
Cooling Failure = voltage alternates between 32 VDC & 0.75 VDC
Service Failure
Measure the voltage between terminals J6-10 & J6-6.
•
Clogged Filter = Approximately 32 VDC.
•
Normal = Less than 1 VDC, approximately 0.75 VDC
•
Fan Failure = 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. Connect each respective terminal wire (6
through 10) from the Zone Sensor to the unit J6 terminals 6 through 10.
Note:
If the system is equipped with a programmable zone sensor, (BAYSENS019A,
BAYSENS020A 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 explains resetting the system from the space; Method 2 explains resetting the system at
the unit.
Содержание TC*150-301
Страница 13: ...RT SVX25C EN 13 Unit Dimensions Figure 1 WITHOUT ECONOMIZER 5 8 WITH ECONOMIZER 5 0 ...
Страница 30: ...30 RT SVX25C EN Installation Figure 17 5 HVAC units 10 HVAC units ...
Страница 31: ...RT SVX25C EN 31 Installation Figure 18 Typical field wiring diagrams for optional controls ReliaTel only ...
Страница 61: ......
Страница 62: ......