Troubleshooting (cont.)
User Keypad and Pump
Symptoms
Probable Causes
Recommended Action
2.
Motor starts, but all
jets are not
functioning.
A.
Jet is closed.
A.
Rotate jet trim counterclockwise to
open.
B.
Jet not installed correctly.
B.
Reinstall jet; check for O-ring damage.
C.
Jets are blocked.
C.
Remove blockage.
3.
User keypad is
illuminated, but does
not respond to
buttons or outer ring.
A.
Control program is locked.
A.
Reset GFCI or RCD.
B.
Wiring harness from user
keypad to control is loose,
disconnected or damaged.
B.
Check wiring for proper connections.
Replace wiring harness if necessary.
C.
User keypad does not work.
C.
Replace user keypad.
D.
Control does not work.
D.
Replace control.
4.
User keypad
indicator bar keeps
scanning at
power-up.
A.
Control program is locked.
A.
Reset GFCI or RCD.
B.
Wiring harness from user
keypad to control is loose,
disconnected or damaged.
B.
Check wiring for proper connections.
Replace wiring harness if necessary.
C.
User keypad does not work.
C.
Replace user keypad.
D.
Control does not work.
D.
Replace control.
5.
User keypad is
illuminated, but
pump will not start.
A.
Power cord from pump to
control is loose, disconnected or
damaged.
A.
Check wiring for proper connections.
B.
Pump does not work.
B.
Replace pump.
C.
Control does not work.
C.
Replace control.
6.
Motor runs but
pump will not prime
(cavitates).
A.
Pump is shimmed too high.
A.
Lower pump/control to subfloor level.
B.
Small air leak at pump inlet.
B.
Securely tighten nut(s) on intake side of
pump.
C.
Motor/pump does not work.
C.
Replace motor/pump.
D.
Control does not work.
D.
Replace control.
7.
Pump stops before
18 minutes.
A.
GFCI or RCD tripped.
A.
Identify source of fault, and correct.
Reset GFCI or RCD.
B.
Suction is blocked.
B.
Remove obstruction.
C.
Jets are blocked.
C.
Remove blockage.
D.
Motor overheated and protection
device activated.
D.
Check for blockage at suction and/or
jets. Remove blockage and allow motor
to cool.
8.
Pump does not
automatically stop
after 22 minutes.
A.
20-minute timer inadvertently
disabled.
A.
See service manual.
9.
Pump will not turn
off when the power
button on user
keypad is pressed.
A.
User keypad does not work.
A.
Replace user keypad.
B.
Control does not work.
B.
Replace control.
10.
Pump operates but
variable speed
feature does not
work.
A.
Motor/pump does not work.
A.
Replace motor/pump.
B.
Control does not work.
B.
Replace control.
11.
Bath water cools
while pump is
operating.
A.
Water temperature above 104°F
(40°C).
A.
Allow bath water to cool.
B.
Heater is turned off on user
keypad.
B.
Turn heater on.
C.
Wiring from heater to control is
loose, disconnected or damaged.
C.
Check wiring for proper connections.
D.
Heater does not work.
D.
Replace heater.
E.
Control does not work.
E.
Replace control.
Kohler Co.
13
1023274-5-C
Summary of Contents for K-856-M
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