ELECTRICAL EQUIPMENT & TESTING
VOLTAGE CHECKS
Generally, these checks will consist of taking readings at the wall receptacle in order to determine the availability of voltage to the product. Voltage checks on individual components of a product are not recommended due to the possibility of electrical shock. Component part testing is best accomplished through continuity checks with an Appliance Test Meter.
NOTE: Use of the meter on voltage higher than the indicated range may cause permanent damage to the meter. To prevent damage, first select highest range and then lower the range for readings which fall within the lower scale.
Clamp-On Ammeter
can be used to detect shorts. Overloads on the circuit breaker or fuse can be traced
to either the appliance or circuit breaker by checking the current draw.
Each circuit in an appliance has a "Normal" current draw, which is an indication of the performance of that circuit. Current draw levels of less than or more than normal give clues to possible malfunctions. The clamp- on ammeter measures these circuits without breaking the circuit by measuring the strength of the magnetic field developed around each conductor. Current is read by separating the conductors and clamping the jaws of the ammeter around each conductor on which current is read. Low amperage readings indicate problems, such as damaged heating elements, etc. High amperage readings indicate the unit being tested is operating under an increased mechanical or electrical load.
NOTE: Overloads on a circuit breaker or fuse can be traced to the product being tested or the circuit breaker (or fuse) by checking the products current draw. If the amperage reading is less than the breaker reading, the breaker or fuse box is at fault.
Use of Ammeter on dishwasher:
1.Motor Current - the reading can be taken at the leads on the motor start relay or at the male connec- tor.
2.Heating Element Current - The reading can be taken using either lead to the element.
Motor Test Cord
!DANGER
To avoid risk of personal injury or death due to electrical shock:
•Disconnect electrical power to dishwasher before servicing.
•Always plug test cord into a properly grounded receptacle.
•Always make connection to components before plugging test cord into receptacle.
A motor test cord may be used to electrically check operation of the various electrical components without removing them from the unit. Testing in this manner merely determines whether or not the part will function independently of other electrical components. In order to make accurate tests, proper connection of the motor test cord is important. With the aid of the drawings under Drive Motor Test, installation of the motor test cord may be done quickly and accurately.
Grounding and Polarity
!DANGER
To avoid risk of personal injury or death due to electrical shock:
•Do not cut or remove the grounding prong from any plug.
The receptacle used for all Maytag products operating on 120 VAC must be properly grounded and polarized.
The power cord used on the appliances should be equipped with a three (3) prong polarized grounding plug
8 | 16022783 Rev. 0 | ©2004 Maytag Appliances Company |
