Honeywell GmbH 20 MU5H-1419GE23 R0815
Unit uses too much salt Improper brine refill setting Check brine refill setting for proper salt
dosage
Improper settings Check water hardness and reevaluate capa-
city setting specification
Excessive water usage See problem "Excessive water in brine tank"
Leaking faucets, toilets, … Repair or replace those items
Softener delivers salt water Low water pressure Check incoming water pressure.
Minimum is 2 bar
Excessive water in brine tank See problem "Excessive water in brine tank"
Wrong size injector Install correct injector
Excessive water in brine tank Injector is plugged Remove injector and clean ports
Faulty piston/seal assembly Replace piston/seal assembly
Plugged or kinked drain line Correct any kinking or plugging of drain line
Backwash flow controller closed off Check backwash flow controller
Defective brine line flow control Remplace brine line flow controller
Softener fails to draw brine Injector is plugged Remove injector and clean ports
Faulty piston assembly Replace piston assembly
Brine line conntection leak Inspect brine line during refill cycle for leaks
Drain line plugged creating excess back
pressure
Inspect drain line for blokkage
Drain Line too high or too long Refer to drain line specification
Low inlet pressure Increase inlet pressure to a minimum of
2 bar
Continuous flow to drain Piston assembly failure Remplace piston assembly
Motor failure Remplace motor
Circuit board failure Remplacer circuit board
Iron in softened water Iron has fouled resin bed Use iron reducing resin cleaner to clean
resin bed, and increase salt dosage or rege-
nerate more frequently.
Iron is not in a soluble state Install iron reduction system
Prefilter failure Check prefilter
Iron level excessive Install iron reduction system
Loss of water pressure Iron built up in resin See problem above
Resin bed fouled with sand and sediment Rebed softener and install prefilter
Absent or incomplete LED display Transformer unplugged Plug transformer into uninterrupted outlet
No electric power at outlet Repair outlet or use working outlet
Defective transformer Change transformer
Defective meter Unplug meter from PC board, if LED displays
lights appropriately, replace meter
Defective PC board Replace PC board
Defective or unplugged Ethernet cable Plug or change Ethernet cable
Control does not display correct time
of day
Power outage > 2 years Reset time of day
Power outage < 2 years - Time of day flas-
hing - Battery discharged
Replace lithium battery
No "softening" display when water is
flowing
Bypass valve in bypass position Put bypass valve in service position
Meter connection disconnected Connect meter to PC board
Restricted/stalled meter turbine Remove meter and check for rotation, clean
foreign material
Defective meter Replace meter
Defective PC board Replace PC board
Problem Cause Remedy
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