Cornelius Brewed Iced Tea, Installation & Service Manual, Page: 49 / 58

Lipton Brewed Iced Tea Training, Installation, & Service Manual
May 7, 2002 - 41 630460171
NO HOT WATER (CONT.) • Heater open or shorted (cont.).
• Defective solid state relay.
• Low Temperature Lockout Error.
• Thermostat adjustments should be in
small increments. We are only using
the bottom part of the total adjust-
ment range of the thermostat. Usu-
ally the tank is adjusted to one tick
mark above medium.
• Replace tank.
• Relay is solid state. Cannot check its
function off of unit since, it requires a
load on the output side to be able to
check it correctly.
• If it fails, it would tend to fail in the
forward (on) position. If it failed, the
tank would be cycling on the tank
thermostat only, no low power mode
or high temp. lock out would be
available.
• On initial startup, the relay would be
on 100% of the time, until 170
°
F is
reached. Once 170
°
F has been
reached the relay would begin to
cycle on low power mode. Signal
voltage from the control module
would supply 3.3 VDC to the low
side, terminals #3 (red) and #4
(black) of the relay. The high side of
the relay would handle the AC line
voltage to the tank thermostat.
• Remember, when checking the relay
for function, that under the low
power mode it will only get a signal
voltage from the control module for
20 seconds out of every minute. To
check accurately for signal voltage, a
meter must be monitored on the low
side for at least a minute.
• Check the high side for voltage, ter-
minals #1 and #2. There should be
line voltage all the time between ter-
minal #2 on the relay and neutral, but
there should only be line voltage
between terminal #1 and neutral
when there is signal voltage to #3 and
#4.
• Low Temp Lockout errors prevent
against an open circuit to the temper-
ature sensor. A Low Temp Lockout
error locks the heater relay off.
• Check that the connection to the tem-
perature sensor is good. Clear the
error by entering the TANK STATUS
mode enter the Set-up menu.
Trouble Probable Cause Troubleshooting & Repair
Procedures