OPERATION EN
13
OS3 DM20036 (3
−
2018)
TROUBLESHOOTING
If a problem cannot be resolved or an error code is displayed that is not listed in this troubleshooting
guide, contact Tennant Company Technical Support at 1
−
800
−
553
−
8033.
Problem
Cause
Remedy
No solution flow from
dispenser.
No water supply.
Turn on water
Check for kinked or bent water lines.
Screen is blank.
No power.
Check power cord connections at both
ends. Confirm cord is connected to
outlet and power supply.
Power supply switch is turned off (in
rear of machine).
GFCI outlet tripped. Reset outlet.
Low salt
indicator will not clear
after multiple resets.
No salt.
Add salt to reservoir.
Check for salt bridge in reservoir.
Break loose to provide salt to system.
SYS120 error
No water to system.
Turn on water. If water supply is turned
off intentionally, unplug machine until
water is restored.
Check for kinked or pinched hoses.
System requires flush.
Dispense 19 Liters (5 Gallons) of
solution through the dispenser and
cycle power.
EC110
Water too cold.
Ensure all system components and
water supply is above 5 C (41 F).
Warm system and press reset.
COM110
Communication error between
water softener and generator.
Check DB9 cable that connects water
softener and generator. Check
connections on both softener and
generator.
COM100
Circuit board (power board)
not connected.
Unplug machine. Press power board
and firmly seat into slot (next to
e
−
module).
WS100
Possible lack of water to
system.
Ensure water is turned on.
PCB120
Expired pH probe.
Replace pH probe.
PM100
Ambient temperature too hot.
Machine must be in an environment
less than 100 C (230 F) to operate.
Resolve temperature and reset.
Chlorine test paper strips
show low ppm of
MultiMicro
200.
Call technical support.
pH test paper strips show pH
of MultiSurface
Cleaner
less
than 10.
Call technical support.
Solution leaking from os3
Loose or damaged fitting.
Damaged salt reservoir or
storage tanks.
Turn off water, unplug machine, and
call technical support.
Water softener overflows
Obstruction or malfunction
Turn off water, unplug machine, and
call technical support.
See
Indicators
in the OPERATION section of this manual for instruction on machine indicators.
