Welbilt MERRYCHEF conneX User Manual

5 Service information
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Merrychef conneX
®
service and repair manual 56
Additional Errors / Faults
Error
Problem
Solution
Door open
Door open continuously
displayed when the
door is closed
Check fuses F5 & F6, if blown replace door switches
Check door switches are adjusted correctly
Check oven door hinges are fitted / working correctly
Check all wiring and connections
Check L1 is present on twin phase ovens
No USB
Memory
detected
Unable to read inserted
USB Memory
Incorrectly formatted USB Memory. Re-format and re-load files.
Slow key, or large file, allow further time for oven to read USB Memory.
Components
not operating
correctly
Components not
operating correctly in
diagnostic view
Check shunts are correctly fitted in X515 & X516 on the IO Board.
5.4 Safe working when testing components
For your safety when testing oven components
Before starting oven tests, familiarize yourself with the rules and hazard warnings in section 2 ‘For your safety’, specifically
section 2.14 ‘Safe working when testing components’.
5.5 Requirements
Equipment required for testing the appliance
HV Capacitor discharge tool Portable
Appliance Tester (P.A.T.) Digital Multi-Meter
(D.M.M.) Proprietary voltage detector Electrical
lock out tools & equipment
Megger / similar 500 V d. c. Insulation tester Microwave
detection / leakage meter (calibrated) Temperature reader
(calibrated)
Microwave safe 600 ml glass beaker
Microwave safe 2 litre container
5.5 mm socket
wrench Torque
wrench
Door Spacer Kit 4mm / 2mm
1000 volt rated general hand
tools 1000-volt proof insulted
rubber gloves PPE
5.6 Testing selected components (casing mounted)
Technical advisory notice: PAT testing of Merrychef ovens
While testing with a Portable Appliance Tester (PAT) is not an automatic requirement for the Merrychef commercial
combination microwave oven models, the following notice is to advise on this testing in addition to the following instructions
as deemed necessary.
If the customer requires PAT testing of the Merrychef equipment we suggest this is limited to a) earth continuity and b)
insulation resistance (measured at ~ 500 V DC). All Merrychef commercial combination microwave ovens are classified as
CLASS 1 for the purpose of testing.
Should it still be deemed necessary by the customer to perform an Earth Leakage test, the following advice should be adhered
to. Note that not all PATs are capable of just measuring the leakage or allow you to set a pass limit and therefore may not be
appropriate for this test.
WARNING
High leakage current
Merrychef appliances are fitted with radio interference filters and inverter circuits which cause an increase in leakage current.
The PAT may indicate an erroneous failure condition depending on its internal "pass"/"fail" settings. Please refer to the revised
limits which apply to the specific Merrychef oven model.
Model
Model maximum limit applied with radio interference filter fitted
conneX 12 & 16
10 mA

Welbilt MERRYCHEF conneX Specifications

General

Brand	Welbilt
Model	MERRYCHEF conneX
Category	Commercial Food Equipment
Language	English