Johnson Controls RC Series Engineering Manual page 11

Controls cont.
Control Tables for Optional Versatec Microprocessor
Logic Board DIP Switch Settings
Switch
SW1 - 1 Test - Selected timings sped up to facilitate troubleshooting
SW1 - 2 Loop - Closed loop freeze sensing setting (15°F)
SW1 - 3 Commercial - Enables NS features when TA32U02 thermostat is used
SW1 - 4 IO Display* - Enables Input/Output display on external LED board
SW1 - 5 Configures board for 2-speed compressor without fan
Normal Control Timing
Blower off delay
Compressor on delay
Short cycle delay
Miniumum compressor on time
High pressure fault recognition delay
low pressure fault recognition delay
Freeze sensing fault recognition delay
Condensate overflow fault recognition delay
Low pressure fault bypass delay
Freeze sensing fault bypass delay
Power on delay
Test Control Timing
Blower off delay
Compressor on delay
Short cycle delay
Miniumum compressor on time
High pressure fault recognition delay
low pressure fault recognition delay
Freeze sensing fault recognition delay
Condensate overflow fault recognition delay
Low pressure fault bypass delay
Freeze sensing fault bypass delay
Power on delay
Fault off time
Diagnostic Modes
LED
Drain
Water Flow
High Press
Low Press
Air Flow
Status
DHW Limit
HWD
OFF
30 seconds
10 seconds
5 minutes
2 minutes (except for fault condition)
Less than 1 second
30 seconds
30 seconds
30 seconds
2 minutes
2 minutes
5 minutes
5 seconds
2 seconds
15 seconds
5 seconds (except for fault condition)
Less than 1 second
30 seconds
30 seconds
30 seconds
0 seconds
0 seconds
15 seconds
5 minutes
Current Fault Status
SW1 - #4 On, SW2 On
Drain pan overflow
FS thermistor (loop <15°F, well <30°F)
High pressure >600 PSI
Low pressure <40 PSI
Not used
Not used
Not used
SW2 in the On position
Normal - Standard timings
Well - Open loop freeze sensing setting (30°F)
Normal - Standard thermostat operation
Normal* - Unit status display
Configures board for 2-speed compressor with fan
Operational Logic
Inputs
SW1 - #4 Off, SW2 Off
Y
G
O
ES
NS
LS
Not used
Off position
11
RC SERIES ENGINEERING GUIDE
ON
Mode Inputs Fan Comp
Htg Y ON ON
Clg Y,O ON ON
Fan G ON OFF
Outputs
SW1 - #4 Off, SW2 On
Compressor
FAN
O
ES
NS
LS
Not used
On position
RV
OFF
ON
OFF