Hoffman Controls Model 610 Series - Troubleshooting Guide; Motor Does Not Run; Current Trip Not Occurring; Home Screen Shows Incorrect or Zero Amps Value

Hoffman
|
Controls
2463 Merrell Road, Dallas, Texas 75229 • Phone: (972) 243-7425 • Fax: (972) 247-8674 • Toll Free: 1-888-HCC-1190
www.hoffmancontrols.com Form: 173-0263-001 Rev. C01
Troubleshooting Guide
1.
Check wiring, review instructions.
2.
Use
Table 7,
Time to Trip Chart
to look
to look
Time to Trip Chart to look Time to Trip Chart
up the trip time and verify motor turns
off appropriately. If not, replace control.
3
.
Orient all transformers identically.
4
.
Check and correct wiring.
1
.
Check wiring / replace transformer(s).
2.
Orient all transformers identically.
3.
Check and correct wiring
4.
Replace control.
1.
Use correct temperature sensor
.
2.
Select correct temperature sensor option.
Select correct temperature sensor option.
3
.
Use correct temperature value.
1.
Turn on 24 VAC.
2
.
Replace 24 VAC transformer.
3
.
Cycle 24 VAC power and recheck.
4
.
Replace control.
Current Trip Not
Occurring
Home Screen
Shows Incorrect
or Zero Amps
Value
Temperature Trip
Fails to Occur
1.
Trip relay
N.C.
and
COM
terminals not wired correctly.
2.
Displayed current not staying above the current trip value long
enough for the excess motor energy to rise to the equivalent of a
locked rotor for 2 seconds.
3.
Current transformers not oriented correctly
.
Current transformers not oriented correctly. Current transformers not oriented correctly
4
.
Current transformers not wired correctly.
1.
Current transformer(s) not connected or bad.
2.
Current transformers not oriented correctly
.
Current transformers not oriented correctly.Current transformers not oriented correctly
3.
Current transformer(s) incorrectly wired
.
4.
Control is bad.
1.
Temperature sensor is not an R - T type thermistor sensor.
2.
Incorrect temperature sensor option selected (
Omega
10K
,
PTC
or
NTC
).
3
.
Incorrect temperature selected (
°
F or ohms
)
1.
Power not turned on.
2
.
Bad 24 VAC transformer
.
3
.
Microcontroller is hung up (
paused)
.
4
.
Control
is bad.
LCD Screen is
Blank
Condition
Cause
Solution
Condition
Motor
Does Not
Motor Does Not Motor
Run
1.
Check and correct wiring.
2.
Correct power wiring.
3
.
Determine lockout cause, fix problem
and reset control.
4
.
Determine why overload occurred and
correct problem.
1.
Motor not wired correctly.
2.
Phase rotation incorrect
.
3
.
Control locked out
.
4
.
Motor off on internal overload.