Helix 21
GB
Troubleshooting
F. Error Input. Sensor does not provide a
valid signal to controller
Er. ,1
1. Sensor improperly wired or open
2. Incorrect setting of sensor type
3. Calibration corrupt
1. Correct wiring or replace sensor
2. Match setting to sensor used
3. Check calibration of controller
G. Limit will not clear or Reset with keypad
or digital input
1. Sensor input is out of limit set point range
2. Limit set point is incorrect
3. Digital input function is incorrect
1. Correct cause of sensor input out of limit range
2. Set limit set point to correct trip point
3. Set digital input function and source instance
H. Limit Error. Limit status cannot be
determined due to a lack of sensor
input, limit will trip.
L ,.E 1
1. Sensor improperly wired or open
2. Incorrect setting of sensor type
3. Calibration corrupt
1. Correct wiring or replace sensor
2. Match setting to sensor used
3. Check calibration of controller
I. Limit Low. Sensor input below low limit
set point.
L ,.L 1
1. Temperature is less than limit set point
2. Limit outputs latch and require Reset
3. Incorrect alarm set point
1. Check cause of under temperature
2. Clear limit
3. Establish correct limit set point
J.LimitHigh.Sensorinputabovehigh
limit set point.
L ,.h 1
1. Temperature is greater than limit set point
2. Limit outputs latch and require Reset
3. Incorrect alarm set point
1. Check cause of over temperature
2. Clear limit
3. Establish correct limit set point
K.NodisplayindicationorLED
illumination.
1. Power to controller is o
2. Fuse open
3. Breaker tripped
4. Safety interlock switch open
5. Separate system limit control activated
6. Wiring error
7. Incorrect voltage to controller
1. Turn on power
2. Replace fuse
3. Reset breaker
4. Close interlock switch
5. Reset limit
6. Correct wiring issue
7. Apply correct voltage, check part number
L.Noserialcommunication.Cannot
establish serial communications with
the controller.
1. Address parameter incorrect
2. Incorrect protocol selected
3. Baud rate incorrect
4. Parity incorrect
5. Wiring error
6. EIA-485 converter issue
7. Incorrect computer or PLC communications port
8. Incorrect software setup
9. Termination resistor may be required
1. Set unique addresses on network
2. Match protocol between devices
3. Match baud rate between devices
4. Match parity between devices
5. Correct wiring issue
6. Check settings or replace converter
7. Set correct communication port
8. Correct software setup to match controller
9. Place 120 Ω resistor across EIA-485 on last controller
M. Temperature runaway. Process value
continues to increase or decrease past
set point.
1. Controller output incorrectly programmed
2. Thermocouple reverse wired
3. Controller output wired incorrectly
4. Short in heater
5. Power controller connection to controller defective
6. Controller output defective
1.Verifyoutputfunctioniscorrect(heatorcool)
2. Correct sensor wiring (red wire negative)
3.Verifyandcorrectwiring
4. Replace heater
5. Replace or repair power controller
6. Replace or repair controller
N.DeviceError.Controllerdisplays
internal malfunction message at power
up.
100
rETn
1. Controller defective
2. Miss wired input or ground loop
1. Replace or repair controller
2. Correct wiring or remove ground loop circuit
O.Menusinaccessible.Unabletoaccess:
Set
Oper
FCtY
ProF
menus or particular prompts in Home
Page.
1. Lockout or Security set to incorrect level
2. Digital input set to lockout keypad
3. Custom parameters incorrect
1. Check lockout setting in Factory Page
2. Change state of digital input
3. Change custom parameters in Factory Page
P. EZ-Keysdonotactivaterequired
function.
1.EZ-Keyfunctionincorrect
2.EZ-Keyfunctioninstancenotincorrect
3.Keypadmalfunction
1.VerifyEZ-KeyfunctioninSetupMenu
2. Check that the function instance is correct
3. Replace or repair controller
Q.Valuetoolowtobedisplayedin4digit
LED display.
vAL.L
1. Incorrect setup 1. Check scaling of source data
R.Valuetoohightobedisplayedin4digit
LED display.
vAL.H
1. Incorrect setup 1. Check scaling of source data
