Helmer DH4 - DH4 and DH8 Parts List

1-360008/G
27
Cycle Time Indicator
does not count down
correctly
- Circuit board - Verify wiring connections on circuit
board
- Verify Start/Stop button is activating
the timing cycle
- Verify that the circuit board is
securely mounted to the chassis
studs
- Replace circuit board as needed
Digital timer does not
display
- Faulty digit light - Replace the digit light or circuit
board
Preprogrammed time
settings do not advance
when the Time Set Button
is pressed
- Push button not activating - Verify Time Set Button activates
when pressed; replace as needed
- Verify that the circuit board is
securely mounted to the chassis
studs
- Faulty circuit board - Replace as needed
DH4 and DH8 Parts List
Description
Part Number
Digital Temperature Controller 400330
Main Controller Board 400272
Heater Triac 120269
RTD sensor 120280
Power inlet 120282
Alarm 120160
Heater (DH4) 120263 – 115v 120263 – 230v 120294 – 100v
Heater (DH8) 120264 – 115v 120264 – 230v 120295 – 100v
Circuit breaker (DH4) 120272 – 115v 120279 – 230v 120110 – 100v
Circuit breaker (DH8) 120281 – 115v 120288 – 230v 120281 – 100v
Fan (DH8) 120150 – 100v