Frymaster H14 Series - Manual (Page 66)

7-16
7-11: ELECTRIC INTERFACE BOARD DIAGNOSTIC CHART
The following diagram and charts provide ten quick system checks that can be performed using
only a multimeter.
Meter Setting Test Pin Pin Results
12 VAC Power 50 VAC Scale 1 of J2 3 of J2 12-16 VAC
24 VAC Power 50 VAC Scale 2 of J2 Chassis 24-30 VAC
*Probe Resistance (RH) R X 1000 OHMS 11 of J2 12 of J2 See Chart
*Probe Resistance (LH) R X 1000 OHMS 3 of J1 2 of J1 See Chart
Hi-Limit Continuity (RH) R X 1 OHMS 7 of J2 4 of J2 0 - OHMS
Hi-Limit Continuity (LH) R X 1 OHMS 4 of J1 7 of J1 0 - OHMS
Latch Contactor Coil (RH) R X 1 OHMS 8 of J2 Chassis 3-10 OHMS
Latch Contactor Coil (LH) R X 1 OHMS 5 of J1 Chassis 3-10 OHMS
Heat Contactor Coil (RH) R X 1 OHMS 9 of J2 Chassis 18-25 OHMS
Heat Contactor Coil (LH) R X 1 OHMS 6 of J1 Chassis 18-25 OHMS
*Disconnect 15-Pin harness from the computer/controller before testing the probe circuit.
Note: The sealed relays are
not replaceable. If a relay fails
the interface board must be
replaced.
Diagnostic LED Legend
CMP CMP CMP CMP indicates power from 12V transformer indicates power from 12V transformer indicates power from 12V transformer indicates power from 12V transformer
24 24 24 24 indicates power from 24V transformer indicates power from 24V transformer indicates power from 24V transformer indicates power from 24V transformer
HI HI HI HI (RH) indicates output (closed) from right Latch (RH) indicates output (closed) from right Latch (RH) indicates output (closed) from right Latch (RH) indicates output (closed) from right Latch
relay
relay relay relay
HI HI HI HI (LH) indicat (LH) indicat (LH) indicat (LH) indicates output (closed) from left Latch relay es output (closed) from left Latch relay es output (closed) from left Latch relay es output (closed) from left Latch relay
HT HT HT HT (RH) indicates output from right Heat relay (RH) indicates output from right Heat relay (RH) indicates output from right Heat relay (RH) indicates output from right Heat relay
HT HT HT HT (LH) indicates output from left Heat relay (LH) indicates output from left Heat relay (LH) indicates output from left Heat relay (LH) indicates output from left Heat relay
AL AL AL AL (RH) indicates output (open) from right Latch relay (RH) indicates output (open) from right Latch relay (RH) indicates output (open) from right Latch relay (RH) indicates output (open) from right Latch relay
AL AL AL AL (LH) indicates output (open) from left Latch relay (LH) indicates output (open) from left Latch relay (LH) indicates output (open) from left Latch relay (LH) indicates output (open) from left Latch relay
1 2 3
4 5 6
8 7 9
10 11 1 2
13 14 15
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
K1 K2 K 3 K4