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Troubleshootin
g
Error
Code
Error
Position
Type Name
Cause Solution
Flow is too high at current
setpoint.
Use a smaller mix chamber
that is rated for the unit in
use.
T2DA
T2DB
Boost A
Boost B
ALARM
Low Chemical
Temperature
Bad heater(s
)
Confirm resis
tance of heater
is 23–26.5 oh
ms. Replace if
OL/open loop
.
T2DH Hose ALARM
Low Chemical
Temperature
Cold chemical in
unheated portion of
system passed hose FTS
at startup.
Recirculate
heated chemical
back to drum
in cold
conditions
before startup.
Radiator fan will not stop. Replace fan relay. See
system repair manual.
T2DE Heat
Exchanger
ADVISORY
Low Temperature
Coolant Outlet
Engine thermostat is
stuck open.
Replace t
hermostat. See
Perkins d
istributor to
replace.
T3NM
MCM ADVISORY
High Mot
or
Tempera
ture
Motor is
operating
outside
of pressure
flow curv
e. The system
is runni
ng at a lower
setpoin
ttopreserve
motor l
ife.
Run the s
ystem at a
lower du
ty cycle or with a
smaller
mix chamber. See
Perform
ance Charts, page
99.
Manual valve switch (MV)
on load center board is in
the ON position.
Open cabinet cover and turn
switch to the OFF position.
A or B side control valve
solenoid is stuck in the
open position. Debris
in valve diaphragm
or plunger preventing
spring-loaded closed
function.
Disconnect connector
from valve solenoid coil.
If temperature does not
decrease, rebuild solenoid.
Shortonloadcenter
board. If the blue and red
LEDsareonwhilethe
heat is off, then the load
center board is bad.
See Load Center
Diagnostics in the system
repair manual.
(T
4BE only) J6 connector
on
load center “Heat
Va
lves” location is not
ce
ntered.
Reconnect J6 connector
on load center in centered
location.
T4AE
T4BE
Heat
Exchan
ger
ALARM
High Chemical
Temperature Hx A
(T4AE)
High Chemical
Temperature Hx B
(T4BE)
A
and B heat
e
xchanger RTD cables
c
ross-connected to
s
plitter cable.
See System Repair Manual
for correct connection.
82 3A1705J