DELTA FLEX COLD TEMP(also hi in sense) STABILITY PROBLEM

1. Check if you have PURGING air going exactly at your TESTSITE RTD
   • Purging air must be 20 TO 22PSI(located at the back of the core electronic drawer.
   • You can easily notice if you have low TESTSITE PURGING PRESSURE when there is "TESTSITE AIR PRESSURE TOO LOW" coming out at your screen.
   • TAKE NOTE:MUST HAVE PURGING AIR AT TESTSITE HEATER so as not to open heater.
   • Should be NO COLD AIR going directly to TESTSITE RTD.
   
   
2. Check for LOOSE CONNECTION from driver board to relay.
   • SLAVE 9 is the one driving the relay for storage and testsite.
   • SLAVE 9 is also the one activating the MAC VALVE for the testsite heater purging air.(that is j9 at your board).
   
   
3. Check if you have 24VOLTS coming from SLAVE 9 in driving the relays.
   
4. Confirm if the storage or testsite relays are defective or functioning well.
   
5. Confirm your TEMP CONTROL BOARD.
   • Temp control board is the one triggerring the slave 9 or 10 to drive its load as stated in step 2.
   • Temp control board is the one receiving the signal from RTD then decode on what you are reading at monitor.
   
   
6. Check or confirm RTD
   • RTD's spec is from -60 to 170 degrees celsius.
     • you can read a "NO READ REPORT" or 33345 at the monitor which means the handler temp is overshooting. The only way to recover is to move down the temperature into its specs.
   • RTD's resistance varies depending on its environmental temperature.
   
   
7. Check Blower fan
   • 2 motors below must be blowing.
   • motor above in reverse(1)
     • blower does not affect the stability as long as the air can circulate.