Operating instructions

66
Operation
Operation:
Troubleshooting guide
Troubleshooting guide.
Problem
number
Problem Possible cause Action
31 Noisy operation  Thunder-type
noise coming from
tank during refill
 Contactor noise
 Fill valve noise
 Normal on larger units, caused by the
cold fill water collapsing steam in the
tank. Reduce psi (minimum of 25 psi)
if inlet water pressure is too high.
 Contactor normally makes a clunk
as it pulls in. A continuous chattering
noise is not normal and is
symptomatic of a failing contactor or
malfunctioning controls. Replace
contactor or troubleshoot the control
system.
 A clicking sound as fill valve opens
or closes and a hissing sound during
fill are normal. A slamming sound as
fill valve closes is water hammer
and can be minimized by installing a
shock arrester.
 A loud buzzing sound indicates poor
alignment of valve stem. Replace
valve.
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