Error Messages (cont.)
A short circuit has been read between the (tN2) and a Com terminal
on the control. Either the wires leading to the (tN2) device are
shorted or the polarity of the wires is reversed. Determine the cause
and remove the short. The error message can be cleared by pressing
either the Menu or Item button.
(See fig. e)
The control is no longer able to read the outdoor sensor due to a
short circuit. In this case the control assumes an outdoor
temperature of 32°F and continues operation. Locate and repair the
problem as described in Installation - Step 7 (page 29). To clear the
error message from the control after the sensor has been repaired,
press either the Menu or Item button.
(See fig. f)
The control is no longer able to read the outdoor sensor due to an
open circuit. In this case the control assumes an outdoor
temperature of 32°F and continues operation. Locate and repair the
problem as described in Installation - Step 7 (page 29). To clear the
error message from the control after the sensor has been repaired,
press either the Menu or Item button.
(See fig. g)
The control is no longer able to read the mix supply sensor due to a
short circuit. In this case, the control operates the mixing device at a
fixed output as long as there is a mixing demand. Locate and repair
the problem as described in Installation - Step 7 (page 29). To clear
the error message from the control after the sensor has been
repaired, press either the Menu or Item button.
(See fig. h)
The control is no longer able to read the mix supply sensor due to
an open circuit. In this case, the control operates the mixing device
at a fixed output as long as there is a mixing demand. Locate and
repair the problem as described in Installation - Step 7 (page 29). To
clear the error message from the control after the sensor has been
repaired, press either the Menu or Item button.
(See fig. i)
99
APPENDIX IV
APPENDIX IV - Error Message Overview
e
f
g
h
i
Summary of Contents for SYSTEMpro 311
Page 1: ...SYSTEMpro 311 Installation Manual...
Page 90: ...88 APPENDIX II APPENDIX II SYSTEMpro 311 Menu Tree...
Page 91: ...89 APPENDIX II APPENDIX II SYSTEMpro 311 Menu Tree...
Page 92: ...90 APPENDIX III APPENDIX III Application Drawings...
Page 93: ...91 APPENDIX III APPENDIX III Application Drawings...
Page 94: ...92 APPENDIX III APPENDIX III Application Drawings...
Page 95: ...93 APPENDIX III APPENDIX III Application Drawings...
Page 96: ...94 APPENDIX III APPENDIX III Application Drawings...
Page 97: ...95 APPENDIX III APPENDIX III Application Drawings...
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