Marine Air Systems ECU-Maxx, Руководство по эксплуатации

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PAGE 26
ECU-Maxx VER:10a 12/1/97
ECU-M
AXX
O
PERATIONS
M
ANUAL
F
AULT HANDLING
&
FAIL
-
SAFE MODES
Fail-Safe
There are three levels of fail-safe protection. Level 1 is the lowest. In this level,
the sensors are not monitored for faults. In the two other levels, the sensor is
monitored for faults. In level 2, if a fault is detected, the fault code is displayed,
but no other action is taken. In level 3, the fault is displayed and the compressor
is shut down.
Lockout
Lockout occurs if three level 4 faults are detected within a heating/cooling
cycle. Lockout causes the system to shut down. Lockout can only be cleared
by going to the OFF Mode and back to the ON Mode using the Power
Button.
Fault Display
When a fault occurs, a fault code is flashed on the display. The flashing can be
removed from the display by pushing and releasing the Power button to reset the
control. This resets the control but does not remove the fault!
Electrical Short Faults
When a short is detected on one of the system output terminals, the ECU-Maxx
will display the fault code "SHO" followed by another code indicating which
output is shorted:
"CO" indicates a Compressor short.
"FA" indicates a Fan short.
"PU" indicates a Pump short.
"rE" indicates a Valve short.
F ailsafe
P ro tectio n
L evel
Actio n D escrip tio n o f Actio n Taken b y E C U -M axx
1 D isp lay fault o nly!
M IN IM U M P RO TEC TIO N LEV EL:
A ir S enso r F ault: H eating/C o o ling immed iately susp end ed ; no rmal
o p eratio n no t resumed until fault cleared . F ault d isp lay: "A IR "
Lo w Vo ltage F ault: EC U - II w ill react acco rd ing to ho w Lo w Vo ltage
S hutd o w n p ro grammed .
N O O TH ER FA ILS A F E P R O TEC TIO N P R O V ID ED .
2
D isp lay fault & shut
d o w n co mp resso r
w ith co ntinuo us
restarts.
IN TER M ED IATE P RO TEC TIO N LEV EL:
A ll actio ns tak en in F ailsafe P ro tectio n Level 1 P lus:
In ad d itio n, the FA U LT C O D E message w ill b e d isp layed b ut
N O A C TIO N W ILL B E TA K EN b y the EC U - II.
3
D isp lay fault &
req uire manual reset
after 4 failures.
M A X IM U M P R O TEC TIO N LEV EL:
FA U LT C O D E messages are d isp layed and the ap p ro p riate actio n is
tak en, acco rd ing to the p ro b lem enco untered .