Instruction/ maintenance manual of the product MCO-GD-10M Garland
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GARLAN D A WELBILT COMPANY BUILT TO LEAD... BUILT T O LAST SER VICE MANU AL THE “M ASTE R” GAS C ONV ECTION OVEN S Models covered in this manual are: MCO-GS-10M : M ASTER C ONVECTION O ven - G AS .
2 This service manual is designed to answer questions related to model operational req uirements, troubleshoo ting and disassembly/assembly procedures. It contains electronic ignition o peration, t rouble- shooting and electronic co ntrol o perations that includ e diagnostic cod es, ladder diagrams, wire diagrams and troubleshoo ting.
3 SECTION 3 : COMPONE NT A CCESS OF FUNCTIONA L COMPONENTS ...... ......... ......... ........ .. 16 DOOR GASKET REPLA CEM ENT ....................................................................................................... ....................
4 GA S CONVE CTION OVEN "GA S SPECI FICA TIONS” TOTA L MA IN BURNER ORIFICE PILOT PILOT ORIFICE GA S PRES. W /C B.T.U.'S ORIFICE A MT. ORIFICE A MT. NA T PRO NA T PRO NA T PRO * ** MCO 40,000 5 / 64 ” (.0781”) #55 2 .020" .012" 1 4.
5 Understanding the sequenc e of operation is necessary in properly trouble-s hooting this appliance. In this s ection the sequence of operation w ill be covered first, as well as c alibration and op eration of com ponents, and bas ic trouble shooting techniques for that specific m odel.
6 A therm oc ouple type test instrum ent is prefer red for m easuring oven temper atures ac curately. Mercury thermom eters are acceptable providing they can be proven accurate. Regardless of the ty pe instr ument used, it is m ost desirable to double-check it just bef ore m aking an oven temper ature check .
7 five tim es doubling the thicknes s with each fold. After the f ifth fold, place the therm ocouple tip in the center of the aluminum piece and fold once m ore.
8 ELECTRO NIC CONT ROLS - “ E” Sequence of Operation (W ith the Oven Doors Closed) 1. Line Voltage is supplied to the Mode Switch, Door Switch and the Momentary Light Switch. 2. Set Mode Switch to COO K and clos e the oven doors . Line Voltage is s ent f rom Mode Switch to power up the C ontroller and to the AUX r elay on the contr oller.
9 ELECTRONIC CONTROL FA ILURE CODES The G ARLAND digital control has a self -diagnostic program . If a problem occ urs within the digital c ontroller, you m ay see one of the "F" codes. Below is a li sting of the "F" codes with explanatio ns: -F1- Relay output is enabled when not cooking.
10 The contr oller needs voltage to operate and i s c apable of operating on three (3) differ ent line voltage s, 115 Vac, 208 Vac, 240 Vac. On the back of the Robertshaw COM6000 there are s everal ¼ ” male spade term inal or p in connections.
11 The Us er Pref erence Of fset is designed to enable the user to adjust the c ontrolling tem perature. T here are two different sty les of controllers used by G ARLAND at the pr esent time.
12 Entry Exit UPO - User Preference Offset . Used by the user to adjust t he controlling temperature +/- 50º in 1º increments. 1. Set the time digits to 00:00. 2. Set the temperature digits to X 10º. 3. Depress & hold the Start button for f ive seconds.
13 The saf ety lockout tim er circuit starts tim ing the m om ent the trial f or pilot ignition star ts. W hen the tim ing period runs out, the trial f or ignition ends, and the control m odule goes into lockout. Before another attem pt to start can be m ade, the S86 m ust be res et.
14 and answering conditions in each box enc ountered, until a problem and/or the repair is ex plained. After any maintenance or r epair, the tr ouble s hooting s equence should be r epeated until the trouble shooting procedur e ends with a normal system operation.
15 CHECK GROUNDING A com m on ground is required f or the pilot burner, the ignitor-sensor, the GND term inal of the S86, and the m ain burner. T he m ain burner generally serves as the com m on ground. If the ground is poor or erratic, saf ety shutdowns may occur occ asionally even though operation is norm al at the tim e of the check out.
16 A PPEA RA NCE CA USE SMALL BLUE FLAME Check for lack of gas f rom : • Clogged orifice filter • Clogged pilot filter • Low gas supply pressure • Pilot adjustment at m inim um LAZY Y ELLOW FL.
17 This se ction will give you the be st way to access compo nent for rep laceme nt. COMPONENT LOCATIONS: Top Front Center Door Chain Door Catch Right Front Control Pa nel 24v Tran sform er, Ignition .
18 2. Lo cate sta inless ste el door gas ket, m ounte d to o ven fron t fra me. 3. Rem ove the #10 Ph illips shee t meta l screw that a ttach t he reta iner to t he oven's f ront fram e. 4. Rem ove stainle ss steel d oor gasket. 5. Rep lace stain less stee l door gaske t and to reverse a bove proced ure to re-install.
19 2. Remove d oor chain assem bly (NOTE: T he “A ” mode l does n ot com e equip ped with do or chain). 3. Remove f lat he ad m etal screw 1/4 ”-20x1/2” f rom b earing retain er. 4. Push th e doo r toward hinge and lif t up. NOTE: Botto m be aring retaine r will stay in place.
20 1 2 3 4 7 5 7 8 6 NOTICE: DEPENDENT DOOR SHOWN 7 To d isassemb le lef t doo r: 1. Once th e doo r has b een rem oved f rom t he oven (ref er to instruction s on t he previous page), remove th e 12 t russ hea d 10 x ½ Phillips screws .
21 1 2 3 4 5 NOTIC E: DEP END ENT R IGHT HAND DOOR SHOWN . 1. Once th e doo r has b een rem oved f rom t he oven (ref er to instruction s on p age 19), remove 9 truss hea d s.m .s. 10 x ½ from the top, b ottom and left s ide (as sh own) from the d oor pa nel .
22 To Replace or A djust Door Latch Mechanis m 1. Open oven doo rs. 2. Remove 2 pan h ead P hillips screws. 3. Lift door latc h mec hanism up an d out of door assemb ly. 4. To a djust lat ch me chanism , loosen lock nu t & and adjust b y tightening or loo sening ad justme nt nu t.
23 A ssembl y FILE NAME JIT00012 7 6 2 1 3 8 5 4 5 9 1. Assemb le moto r moun t plate , * insulat ion, moto r moun t plate inner t ogether b y fast ening f our f lat hea d m.s . 1/4-20 x2½ " into th e f our hole s note d on t he ab ove drawings.
24 Main B urner, Pilo t Burne r Rem oval & Doo r Micr o Sw i tch Loc ation 1 2 3 4 To a ccess the Burne rs, Pilot or Do or Switch - rem ove the lo wer combust ion cha mber, (not sho w). This e xposes the se com pone nts, also you will note th at the rating or da ta plat e is on the insid e of the co mbust ion shrou d.
25 SECTION 4: - C OMMO N W IRE D IA GRA MS.
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An important point after buying a device Garland MCO-GD-10M (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Garland MCO-GD-10M yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Garland MCO-GD-10M - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Garland MCO-GD-10M you will learn all the available features of the product, as well as information on its operation. The information that you get Garland MCO-GD-10M will certainly help you make a decision on the purchase.
If you already are a holder of Garland MCO-GD-10M, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Garland MCO-GD-10M.
However, one of the most important roles played by the user manual is to help in solving problems with Garland MCO-GD-10M. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Garland MCO-GD-10M along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
