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TROUBLESHOOTING
P
o r
b
e l
m
A. Display flashes
"Opn" & "rEL"
B. Display flashes
"SHr" & "rEL"
C. Display shows "LLL"
D. Display shows "HHH" for
an extended period of time
To reset all times and temperatures to the factory settings, turn unit off, press and
hold the UP and DOWN ARROW BUTTONS at the same time, turn unit back on. A "P"
will appear in the display and all times and temperatures will be reset to the original
factory settings.
WIRING DIAGRAM — DHB-P1A
528-500revD_EN
C
a
u
s
e
Open relay.
Circuit inoperable
Shorted relay.
Circuit inoperable.
O
p
e
n
h
e
a
e t
. r
Temperature is below 75° F
Heater inoperable.
Probe inoperable.
Relay Inoperable
Temperature is above300° F
(abnormal operation)
S
l o
t u
o i
n
Replace Power Circuit Board
Replace Power Circuit Board.
T
e
t s
h
e
t a
r e
Normal display during warm up.
Test heater resistance.(150.2 Ohms)
Check for open thermocouple wires from
probe. Replace heater/probe assembly.
Diagnostic circuit inoperable. Replace
Power Circuit Board.See B above.
assembly.
5
e r
s
s i
a t
n
c
. e
1 (
5
0
2 .
O
h
m
Printed in USA 10/10 © 2010
) s
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