Operation / Technical Manual
NORM-O-TEMP
®
, Model 111W
Page 66 of 82
Observation
Possible Problem
Action To Be Taken
K. The unit sounds an alarm.
The LO WATER indicator
light is on. The water level is
correct.
The 2-pin connection cable
from the LOW WATER float
switch is disconnected.
The low water level sensor is
defective.
Reconnect the 2-pin
connector.
Replace the low water level
sensor. See Section 6-14.
L. Unit is set to operate.
The water flow indicator
does not move; i.e. water
not circulating.
Disengaged quick-
disconnect couplings.
Clogged water line.
Clogged water filter.
Kink in connecting hose
and/or blanket.
Clogged pad.
Pump not running.
Defective microprocessor
board.
Defective power supply
board.
Check all couplings for
proper fit.
Use forced air to drain unit
and pad.
Clean water filter. See
Section 6-5.
Straighten hose.
Use forced air to clean
coupling.
Check for voltage to the
pump. If measured voltage
is approximately the same as
line voltage, check pump
housing for possible
obstruction. See Section 6-4
if pump must be replaced.
Check and replace pump
motor. See Section 6-4.
Replace microprocessor
board, See Section 6-16.
Replace power supply board,
See Section 6-15.