Model FF-2500 Proportioning Unit
30
25942-1, Issue 4
Hose Heat System
To avoid unnecessary repairs, try the recommended solutions in the order given for each
problem. Before assuming there is a problem, determine that all circuit breakers,
switches, and controls are properly set. Turn off all switches, disconnect and lock out
incoming power at the source, and allow the chemicals to cool before attempting these
procedures.
Problems Solutions
Hose warm but does not reach temperature or takes too long to reach
temperature
1, 2, 8, 11
Hose does not heat; Red Light on Controller is lit.
2, 3, 4, 5,
Hose Heat Circuit Breaker trips or fuse blows
2
Hose temperature not maintained during flow
1, 2, 7, 8, 11
Hose or hoses adjacent to the unit are warm - hoses downstream are cold
4
Controller displays the code Er1
9
Controller displays the code Er2, Er3
10
NOTE:
Refer to the Primary Heater
troubleshooting section for
additional solutions.
Troubleshooting techniques for
the Digital Temperature Process
Controllers are equally valid for
both the Primary Heater Controller
and the Hose Heater Controller.
Controller displays the code Er4
6
S
OLUTIONS
1. HOSE LENGTH- The design of the FF-2500 hose heater allows it to operate with up
to 310 feet of hose. Hose lengths greater than that reduce the ability of the hose heat
to reach temperature. (See Initial Machine Set up) In addition, if chemical or
ambient temperature is too cold, the hose circuit may not have enough power to
maintain the chemical temperature.
2. HOSE HEAT POWER SET - Ensure that the power set is adjusted to 45-50 amps
(do not exceed 50 amps).
3. HOSE HEAT FUSE- With the power OFF, remove the fuse and check it for
continuity or simply replace it with one known to be good.
WARNING:
R
EPLACE THE FUSE WITH ONE OF THE SAME RATING
. A
SUBSTITUTE MAY
DAMAGE THE EQUIPMENT AND CREATE A POTENTIAL SOURCE OF INJURY TO THE OPERATOR
. I
F
THE FUSE FAILS A SECOND TIME
,
FIND AND CORRECT THE CAUSE OF THE FAILURE BEFORE
CONTINUING PROPORTIONING UNIT OPERATION
.
4. HOSE HEATING ELEMENT- With the power control adjusted full
counterclockwise and the hose heat circuit breaker and main switch OFF, check to
see that the Power-Lock connectors on the hoses and all electrical connections
between the hoses and proportioning unit are tight. If these connections are secure
and hose heat is not present, then make a systematic search for the electrical fault as
follows:
a) Starting at the gun whip hose, unplug the Power-Lock connectors and plug
the hose jumper plug into the last “upstream” segment of hose.
