AmeriWater 000-HS120, Operation & Maintenance Manual

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58
098-0007 Rev B
heater button located on
Diagnostics menu page 1
 Output will provide 24 VDC
when active
24 VDC power supply (PS1)
failure
 Verify that touch screen is
functional when power
switch is on. If touch screen
is not active, 24 VDC power
supply may be shorted or
faulty
 Check for 24 VDC at output
terminals of power supply
(PS1)
120 VAC connection to heating
element is loose
 Remove power from device.
Locate heating element on
side of tank and verify that
wires on heating element are
secure
 With power on, verify that
heating element has 120
VAC across terminals when
activated
Pump does not turn on
SSR2 failed open
 Verify that 24 VDC is
measured across terminals 3
and 4 on SSR2 when pump
output (O6) on PLC is active
 Verify that constant 12 VDC
is measured on terminal 1
between terminal and 0V2
12 VDC power supply has failed
 Check that fan at rear of
device is operating
 Verify that 12 VDC is
measured at terminal 12V2
and 0V2
Pump motor failure
 Verify that 12 VDC is
measured across terminal 2
of SSR2 and 0V2 on terminal
strip
 If 12 VDC is measured on
output of solid state relay,
pump motor has failed
Relay output from controller has
failed open
 Verify that 24 VDC is
measured across terminals 3
and 4 on SSR2 when pump
output (O6) on PLC is active
24 VDC power supply failure
 Verify that touch screen is
functional
 Check for 24 VDC ± 10%
between 24V1 and 0V1 on
terminal strip.
Low level float switch has failed
“Closed”
 Allow water tank to fill for
approximately 2 minutes
(when fed by MROC)