Dp.3 Check The Operation Of The Power Relay Or Thermostats - Nordson ProBlue P4 Manuel

DP.3 Check the Operation of the Power Relay or Thermostats

Removing a hose/gun
module
E 2011 Nordson Corporation
The pre‐conditions for this diagnostic procedure are as follows:
S
The heater LED is illuminated.
S
Indicator DS2 on the main board is not illuminated.
S
Indicators DS5 and DS6 on all hose/gun modules are not illuminated.
1. De‐energize the melter. Refer to Section 1, Safety.
2. Remove all of the hose/gun modules.
3. Re‐energize the melter.
NOTE: If an F1 fault re‐occurs after re‐energizing the melter, reset the
melter and turn the heaters back on.
4. Press the Heaters key.
See Figure 6‐1.
5. Check indicator DS2 on the main board, and then do one of the following:
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If indicator DS2 does illuminate, go to step 6.
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If indicator DS2 does not illuminate, got to step 7.
6. Locate a failed hose/gun module by individually replacing and checking
each module as follows:
a. De‐energize the melter.
b. Replace the hose/gun module.
c. Re‐energize the melter.
d. Check if LED DS5 illuminates.
Replace the hose/gun module that causes LED DS5 not to illuminate
when the melter is re‐energized.
7. Complete one or both of the following checks to determine if the main
board or a thermostat has failed:
a. Check for 21–27 VDC across receptacle J9, pins 1 and 6. If the
voltage is incorrect, replace the main board, otherwise go to b.
b. Check for 21–27 VDC across receptacle J9, pins 2 and 6. If the
voltage is incorrect, one or both of the thermostats or the wire harness
connected to receptacle J7 has failed. Refer to DP.6 Check the
Resistance of the Tank/Manifold Thermostat. If the voltage is correct,
replace the main board.
6‐15
Troubleshooting
Part 1024496_05