FGP55 SERIES GAS RETHERMALIZERS
CHAPTER 1: SERVICE PROCEDURES
1-27
1.8.1 General Troubleshooting (cont.)
PROBLEM
PROBABLE CAUSES
CORRECTIVE ACTION
A.
Float switch stuck or defective.
A.
Press the ON/OFF switch off. Clean
float switch and make sure that the
float switch is not bent and that the
float moves freely up and down. Then
press the ON/OFF switch on. Replace
if found to be found defective.
B.
Gas valve is not turned on.
B.
Turn the gas valve knob to the
ON
position.
Display shows
.
Heating indicator is on,
but burners will not
light.
C.
Manual gas shut off valve closed.
C.
Verify that any in-line manual shut off
valve is open. Verify that gas main
cut off valve is open.
Display shows
,
but rethermalizer
operates normally
(false alarm).
A. Failed computer.
A. If available, substitute a computer
known to be working for the suspect
computer. If the rethermalizer
functions correctly, order replacement
from FASC.
Display shows
,
heating indicator cycles
on and off normally,
but burners will not
light.
A.
Failed computer.
A.
If available, substitute a computer
known to be working for the suspect
computer. If the rethermalizer
functions correctly, order replacement
from FASC.
Display shows
,
and the rethermalizer
appears to operate
normally.
A. Defective probe.
A. Check temperature probe against
standard Minco probe resistance chart.
If found defective replace temperature
probe. Also make sure that there is
enough mineral content in the water to
conduct resistance. See
corrective action on the preceding
page.
A. Defective probe.
A. Check temperature probe against
standard Minco probe resistance chart.
If found defective replace temperature
probe. Also make sure that there is
enough mineral content in the water to
conduct resistance. See
corrective action on the preceding
page.
Display shows
HI
and
the rethermalizer
appears to operate
normally.
B.
Failed computer.
B.
If available, substitute a computer
known to be working for the suspect
computer. If the rethermalizer
functions correctly, order replacement
from FASC.
