SEZ S
ERIES
C
OUNTERTOP
S
TEAMERS
T
ROUBLESHOOTING
O
PERATOR
’
S
M
ANUAL
1183437
P
AGE
25
TROU
BLE
S
H
OOTI
N
G
Figure 8
Heating Element Resistance Check (at Contactor)
B
A
Contactor
(top view)
C
1.
DISCONNECT POWER AT CIRCUIT BREAKER.
2. Remove control panel.
3. DO NOT REMOVE HEATING ELEMENT LEAD WIRES FOR THIS TEST.
4. Place test leads between terminals A and C on left side of contactor.
5. Check the resistance and compare to the allowable range in the following table:
Model SEZ/3
Model SEZ/5
Allowable Resistance (Ohms)
Allowable Resistance (Ohms)
Three-Phase
Single-Phase
Three-Phase
Single-Phase
Voltage
A-B or B-C
A-C
A-C
A-B or B-C
A-C
A-C
208
10 to 12
14 to 16
5 to 6
8 to 10
11 to 13
4 to 5
220
12 to 13
15 to 18
6 to 7
9 to 11
13 to 15
5 to 6
240
14 to 16
18 to 21
7 to 9
11 to 13
15 to 17
6 to 7
480
55 to 64
73 to 85
29 to 34
45 to 52
60 to 70
24 to 28
6. For three-phase units, check resistance between terminals A and B and between terminals B and
C similarly.