11: electric interface board diagnostic chart, Diagnostic led legend – Frymaster H14 Series User Manual
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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