2 2 OVEN SYSTEMS

Testing Procedure

2. Place the RTD in a bowl of ice water for 2

1. Disconnect line voltage to the unit.

minutes.

 

2. Take a resistance reading of the coil.

3. Take a resistance reading of the RTD.

3. If coil resistance is correct (585 W):

4. If RTD resistance is not 100 W, RTD is

a) Apply line voltage to the unit.

defective and must be replaced.

 

b) Check for 24 VDC at the coil of the

NOTE: Use Figure 32 to determine resistance

relay when the unit is calling for heat.

readings at temperatures other than freezing.

c) Check the state of the contacts.

 

-If the normally open contacts (7 & 4

Smart Card Reader

or C & NO) are closed when coil

The smart card reader allows the oven operator

voltage is applied, the relay is

to load a menu/firmware update from a smart

functioning normally.

card. A menu that already exists in the oven can

 

-If the normally open contacts (7 & 4

also be saved to a smart card. For instructions,

or C & NO are not closed when coil

see page 15.

voltage is applied, the relay must be

 

replaced (page A-7 and A-8).

Speaker

 

4. If the coil resistance is incorrect, replace the

The speaker is separate from the control board,

relay.

and provides audible feedback to the oven oper-

 

ator whenever a key is pressed or a fault occurs.

Relay, Solid State - K5/K4 Heaters

 

The solid state relay is a 240 VAC, dual 40-amp relay, and switches power to the heaters.

RTD

The RTD is a resistance temperature detector used to detect the cavity temperature.

Testing Procedure

1.Disconnect the RTD from the I/O control board.

Thermostats - 120ºF (Close on Rise)

The cooling fan thermostats actuate the cooling fans when the temperature in either end bell reaches or exceeds 120ºF (49ºC).

Wire Harness

The wire harness distributes power to the oven’s electrical components. See pages 37-40 for schematics.

ºF

+20º

+40º

+60º

+80º

+100º

+120º

+140º

+160º

+180º

+200º

 

 

 

 

 

 

 

 

 

 

 

 

90.03W

97.39W

101.74W

106.07W

110.38W

114.68W

118.97W

123.24W

127.50W

131.74W

135.97W

 

 

 

 

 

 

 

 

 

 

 

 

+200º

135.97W

140.18W

144.38W

148.57W

152.74W

159.90W

161.04W

165.17W

169.29W

173.39W

177.47W

 

 

 

 

 

 

 

 

 

 

 

 

+400º

177.47W

181.54W

185.60W

189.64W

193.67W

197.69W

201.69W

205.67W

209.64W

213.60W

217.54W

 

 

 

 

 

 

 

 

 

 

 

 

+600º

217.54W

221.47W

225.38W

229.28W

233.17W

237.04W

240.90W

244.74W

248.57W

252.38W

256.18W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ºC

+10º

+20º

+30º

+40º

+50º

+60º

+70º

+80º

+90º

+100º

 

 

 

 

 

 

 

 

 

 

 

 

100.00W

103.90W

107.79W

111.67W

115.54W

119.40W

123.24W

127.07W

130.89W

134.70W

138.50W

 

 

 

 

 

 

 

 

 

 

 

 

+100º

138.50W

142.29W

146.06W

149.82W

153.58W

157.31W

161.04W

164.76W

168.46W

172.16W

175.84W

 

 

 

 

 

 

 

 

 

 

 

 

+200º

175.84W

175.91W

183.17W

186.82W

190.45W

194.07W

197.69W

201.29W

204.88W

208.45W

212.02W

 

 

 

 

 

 

 

 

 

 

 

 

+300º

212.02W

215.57W

219.12W

222.65W

226.17W

229.67W

233.17W

236.65W

240.13W

243.59W

247.04W

 

 

 

 

 

 

 

 

 

 

 

 

Figure 32: Temperature/Resistance Relationship Class B. Resistance @ 0ºC = 100.0, Alpha = 0.003850

Page 40
Image 40
Turbo Chef Technologies 2020 manual Voltage is applied, the relay is, Functioning normally, Relay

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