CSZ Norm-O-Temp 111W, Руководство по эксплуатации и техническому обслуживанию

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Operation / Technical Manual NORM-O-TEMP
®
, Model 111W
Page 65 of 82
Observation Possible Problem Action To Be Taken
G. Unit is set to operate.
When the unit goes through
its test indicator cycle, the
display shows a typical
pattern display; e.g. all
333’s.
Microprocessor control
board malfunctioned.
Replace the microprocessor
control board. See Section 6-
16.
H. The unit is operating and
the unit momentarily blanks
and then goes through start
up cycle.
Low line voltage or power
interruption.
A loose connection of the
power cord.
Check line voltage and
proceed with operation.
Check line voltage and
proceed with operation.
I. The unit is operating and it
will not heat or pump water.
The independent high limit
safety thermostat has
tripped or it is defective.
Recalibrate the independent
high limit safety thermostat:
See Section 6-9.
Replace the independent
high limit safety thermostat
if found to be defective; see
Section 6-8.
J. The unit is operating, the
display reads ERR, the alarm
sounds.
Defective water temperature
sensor.
Defective microprocessor
board.
Replace the water
temperature sensor. See
Section 6-6.
Replace microprocessor
board. See Section 6-16.