Control Panel; Trouble Shooting - Unitrol 8400 Manual

UNITROL MODEL 8400, 8401, 8406, 8450, 8451, 8456
SV light ON.
When temperature
displayed is selected
target temperature ("SV").
SV light OFF
When temperature
displayed is water tank
temperature.
Push the SEL button to
toggle between functions.
C1 light. When ON,
the compressor in the
RIGHT MODULE is
ON.
AL1 light. When ON,
the compressor in the
LEFT MODULE is ON.
When ON, the water
level is low in the tank.
When ON, the Freon
pressure in the RIGHT
MODULE is above
setting on high
pressure safety switch.
When ON, the Freon
pressure in the LEFT
MODULE is above
setting on high
pressure safety switch
Main ON/OFF switch
for the entire system.

TROUBLE SHOOTING

CONTROL PANEL

14
Water pump pressure
When ON, the Freon
pressure in the
RIGHT MODULE is
below setting on low
pressure safety
switch.
When ON, water flow
through evaporator in
RIGHT MODULE is
below setting of the
water flow switch in
that module.
When ON, water flow
through evaporator in
LEFT MODULE is
below setting of the
water flow switch in
that module.
When ON, the Freon
pressure in the
module 1 is below
setting on low
pressure safety
switch.