Nortec MES2 - Manual (Page 47)

Troubleshooting | 44
Table 7: Troubleshooting MES2 Faults (Continued)
Yellow LED System Detected Cause Corrective Action(s)
2 flashes
No Current
Fill valve activated for
long time but high water
level not reached.
Fill should be faster than
1” per minute.
1 Drain valve leaking or stuck
open
1 Clean drain valve or replace
(see maintenance chapter)
2 Water shut off valve closed 2 Open shut off valve
3 Fill Valve strainer blocked 3 Clean out strainer on fill valve
4 High system back pressure 4a Check for kinked hose
4b Check for proper
condensate removal (see
installation chapter)
5 High water sensor not
connected
5 Check that cylinder plug with
white marker is connected to
short electrode with a plastic
collar around it and to control
board.
6 Low water conductivity 6a Check conductivity of water.
If less than 150
microsiemens contact factory
for recommendation.
6b Add 1/4 teaspoon of salt to
fill cup and restart unit.
3 flashes
No Current, High Water
Water level at top of
cylinder with no current
1 Primary wire not looped
through current transformer.
1 Open disconnect, rewire
primary wire through current
transformer.
2 1 phase of 3 phase supply
blown
2 Check that all phases are
energized.
3 High water sensor plug is on
an electrode pin.
3 Install high water senor plug
on cylinder pin with collar
around it.
4 Cylinder plugs installed
incorrectly
4 Check that cylinder plugs
colors match markers next to
electrodes on cylinder and
that white marked cylinder
plug is connected to pin with
collar around it.
4 flashes
Cylinder Spent
Electrodes covered with
scale.
1 Cylinder electrodes are
calcified.
1 Replace cylinder with same
model number (see
maintenance chapter)
2 Software incorrectly detected
cylinder is spent
2a If fault has occurred shortly
after start up then check for
low water conductivity. (See 2
flashes cause 6)
2b Check if water in cylinder is
foaming. If yes see 1 flash -
Excess current causes.