Nortec MH Series - Manual (Page 64)

61 | Maintenance and Servicing
MHTC Service Warning/Fault
The MHTC controller includes a timer that monitors operating hours and generates a warning
when service is required or the UV lamp needs to be replaced. Optimal maintenance time is
dependent on water supply conditions and usage. The default factory service reminder is
equivalent to 800 hours of operation at 100% output. Failure to perform maintenance when
the service warning is displayed will cause the unit to lock out. Nortec is not responsible for any
damages resulting from, or attributed to not performing required maintenance. (see
Manufacturer’s Warranty).
Warning
When the MHTC software
determines that the service timer
or UV lamp life has elapsed it first
displays a warning and turns on
the yellow service LED. The
MHTC will continue to operate for
another 168 hours after the
warning is displayed.
Fault
After 168 hours the MHTC will
display a fault and shut down.
If maintenance is not possible the
MHTC can be temporarily put
back into service by turning the
MHTC off and on. The MHTC will
run for another 168 hours.
This reset can be repeated 4
times after which the MHTC will
not run until the Stage Reset
function is entered in the
software’s Maintenance Menu.
Figure 47: Service Warning / Fault
NOTE:
 If the “Stage Reset” service reminder is not reset the MHTC may fault out on the
W28 Maintenance Fault despite the fact that the maintenance has been
performed.
 After performing the first maintenance on the MHTC it is possible to increase or
decrease the service period to match water and air conditions. If the media and
drain pan are relatively clean and free of dirt and scale increase the service
period. If there is a lot of scale or the media looks dirty then from dirt and dust
then reduce the service period and consider increasing cleaning cycles (See MHTC
Configuration)
Service LED On
+
W28 Maintenance =
Service timer has
expired and MHTC
needs maintenance.
or
W29 UV Maintenance =
UV Lamp lifespan reached.
MHTC continues to
operate.
Menu Info
Fault LED On
+
E28 Maintenance =
Service timer + 168 hours
has passed. Maintenance
must be performed.
or
E29 UV Maintenance =
UV Lamp lifespan +168 hours
has passed.
MHTC has
shut down.
Menu Info
Warning
W28 Maintenance
W29 UV Maintenance
Standby
!
Error
E28 Maintenance
Protected
!
After 168 Hours
(7 days)