Nortec MH Series installation manual Unit Faults, 10-30, Page

1.2.2 Unit Faults

	Warning		Error
LED	Display	LED	Display
External	safety chain is
open
Red			--
and
green
flash

Error level sensor	Error level sensor
Red	Red
flashes	lights

Maximum filling time	Maximum filling time
exceeded (30 minutes)	exceeded (more than 4
	hours)
Red	Red
flashes	lights
		Note: This error
		message is reset
		automatically as
		soon as the water
		supply functions
		again.

10-30

Page 30 2008-12-03

Cause

Air proving interlock open.

Air flow monitor triggered

Safety humidistat triggered.

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

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

Inlet valve blocked or defective.

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

Leakage in the water drain system.

Remedy

If applicable, check/turn on fan.

Check fan/filter of the fan system.

Wait, if applicable, check safety humidistat

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.

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

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

Check/replace drain valve, connect drain valve.

Check/seal water drain system.