Resistance chart – Frymaster Heated Landing Zone HLZ 22 User Manual

Page 18

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Frymaster L.L.C., 8700 Line Avenue 71106, P.O. Box 51000, Shreveport, Louisiana 71135-1000

318-865-1711 FAX 318-862-2394

Printed in the United States Service

Hotline

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16

1-800-24-FRYER




Output power

• With the computer plugged in and turned on, check for 14VDC from pin 5 on the computer

terminal to ground.


10.3 Transformer

Symptom: Unit has no display

Test:

• Line voltage should be measured across the

input side of the transformer; 12VAC should be
measured across the output side.


10.4 Plate Heater RTD

The following tests are conducted without power
applied.

Symptom: Unit displays Probe. Actual plate temp is
not within 5°F of setpoint. Temperature must be
taken from thermocouple built into unit.

Test:

• With power removed from the HLZ, measure

resistance between pins 9 and 13 on the
computer plug and compare readings to listing on
the resistance chart. With the unit cool, the
resistance reading should approximate the
resistance shown on the chart for the room temperature. Also check for short to ground. A
chaffed wire shorting to the chassis can produce resistance readings within proper range.


10.5 Air RTD


Symptom: Unit displays Probe. Actual air temp is not within 5°F of setpoint.

Test:

• With power removed from the HLZ, measure resistance between pins 14 and 15 on the

computer plug and compare with air temperature on the resistance chart in this section.
Also check for short to ground. A chaffed wire shorting to the chassis can produce
resistance readings within proper range.

Centegrade

Fahrenheit

Ohms

21

70

1080

27

80

1101

32

90

1122

38

100

1143

43

110

1164

49

120

1185

54

130

1206

60

140

1226

66

150

1247

71

160

1268

77

170

1289

82

180

1309

88

190

1330

93

200

1350

99

210

1371

104

220

1391

110

230

1412

116

240

1432

121

250

1453

127

260

1473

132

270

1493

138

280

1514

143

290

1534

149

300

1554

Resistance chart

Resistance Chart

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