7.10Interface Board Diagnostic Chart
The following diagram and charts provide ten quick system checks that can be performed using only a multimeter.
PN
NOTE – When testing the test points on J1
and J2 test use the illustration above depicting the location of Pin 1.
Pin 1 is located in the bottom right corner of Both J1 and J2. These test points are ONLY for RE Series boards with J1 and J2 plugs on the front of the board.
| Diagnostic LED Legend |
CMP | indicates power from 12V transformer |
24 | indicates power from 24V transformer |
HI | (RH) indicates output (closed) from right latch |
| relay |
HI | (LH) indicates output (closed) from left latch |
| relay |
HT | (RH) indicates output from right heat relay |
HT | (LH) indicates output from left heat relay |
AL | (RH) indicates output (open) from right latch |
| relay |
AL | (LH) indicates output (open) from left latch |
| relay |
Meter Setting | Test | Pin | Pin | Results |
12 VAC Power | 50 VAC Scale | 3 of J2 | 1 of J2 | |
24 VAC Power | 50 VAC Scale | 2 of J2 | Chassis | |
*Probe Resistance (RH) | R X 1000 OHMS | 11 of J2 | 10 of J2 | See Chart |
*Probe Resistance (LH) | R X 1000 OHMS | 1 of J1 | 2 of J1 | See Chart |
R X 1 OHMS | 9 of J2 | 6 of J2 | 0 - OHMS | |
R X 1 OHMS | 6 of J1 | 9 of J1 | 0 - OHMS | |
Latch Contactor Coil (RH) | R X 1 OHMS | 8 of J2 | Chassis | |
Latch Contactor Coil (LH) | R X 1 OHMS | 5 of J1 | Chassis | |
Heat Contactor Coil (RH) | R X 1 OHMS | 7 of J2 | Chassis | |
Heat Contactor Coil (LH) | R X 1 OHMS | 4 of J1 | Chassis |
* Disconnect