Software Initial Self-Test; Software Flow Chart With Definitions; Self-Help; Table 2. Self-Test Messages - Nortec NH Series Installation Manual

E. SOFTWARE INITIAL SELF-TEST
Graphic Display
NHTC START-UP:
INIT CYLINDER
NHTC START-UP:
READING CYLINDER DATA
SELF TEST CYLINDER
Inlet Valve
ESC
SELF TEST CYLINDER
Drain Valve
ESC
SELF TEST CYLINDER
Heat Cont.
ESC
SELF TEST CYLINDER
Pump
ESC
SELF TEST CYLINDER
Bleed Valve
ESC
SELF TEST REMOTE
Steam Relay
ESC
SELF TEST REMOTE
Service Relay
ESC
SELF TEST REMOTE
Error Relay
ESC
SELF TEST REMOTE
Oper. Relay
ESC
F.

SOFTWARE FLOW CHART WITH DEFINITIONS

(1) The flow chart in Figure 7 depicts the software logic and definitions.
G. SELF-HELP
(1) The microcomputer applies corrective actions whenever its self-diagnostics identifies a
problem that it is able to correct by itself. If the corrective action is not successful then
it displays a system message. If the corrective action requires a service person, then
the microcomputer's only resort is to stop the unit and display a system message. The
unit never stops unless it has to.
(2) After three days of no call from either the on/off controls or the modulating controls,
when active, the three-day drain active feature is automatically activated long enough
to drain all water from the steam cylinder. This NORTEC feature will prolong the life of
the cylinder. (User selectable, default is ON.)
10-20
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2008-08-28

Table 2. Self-Test Messages

Explanation/Comments (What You Read)
The unit is beginning its bootup routine, along with powering up the EEPROM on the
SMART Cylinder
The unit reads the type of cylinder to provide maximum control of operation. If it
unable to do so it will skip the rest of the self-test and fault out.
Unit energizes the fill valve for 1 second.
Unit energizes the drain valve for 2 seconds.
Unit closes the contactor for 2 seconds.
Unit activates the pump (if present) for 2 seconds.
Unit activates the bleed valve (if present) for 2 seconds.
Unit activates the steam relay for remote fault indication package and green light.
Unit activates the service relay for remote fault indication package and yellow light.
Unit activates the error relay for remote fault indication package and red light.
Unit activates the unit on relay.