Nortec MH Series User Manual

Page 34

10-30

Page 30
2008-12-03

1.2.2 Unit Faults

Warning Error

Cause

Remedy

LED Display

External safety chain is
open

Red
and
green
flash

Air proving interlock
open.

If applicable,
check/turn on fan.

Air flow monitor
triggered

Check fan/filter of
the fan system.

Safety humidistat
triggered.

Wait, if applicable,
check safety
humidistat

Error level sensor

Red
flashes

Red
lights

The level sensor is
blocked or defective
(broken or short-
circuited).

Check/clean or
replace level
sensor. Check level
sensor with
ohmmeter: If no
water is in the tub,
the circuit of the
level sensor must
be closed. If the
water in the tub is
on maximum

level

sensor must be
open.

Maximum filling time
exceeded (30 minutes)

Maximum filling time
exceeded (more than 4
hours)

Red
flashes

Red
lights

Note: This error
message is reset
automatically as
soon as the water
supply functions
again.

Water supply
blocked/shut-off valve
closed/water pressure
too low. Water
treatment unit (fully
demineralised water)
is regenerating.

Check water supply
(filter, pipes, etc.),
Check/open shut-
off valve, Check
water pressure.

Inlet valve blocked or
defective.

Check strainer in
the inlet valve,
clean if necessary.
Replace inlet valve.

Drain

valve

open,

blocked in open
position or not
electrically
connected. Drain
valve is open unless
powered

Check/replace
drain valve,
connect drain
valve.

Leakage

the

water

drain system.

Check/seal water
drain system.