Troubleshooting 3
© 2000 Martin Professional A/S, Denmark
Martin University MAC 2000 Service Seminar
LAMP
The lamp circuit is similar to other Martin discharge lamp fixtures such as the MAC 500.
Note, though, that there are 2 thermo-switches in the lamp circuit and a door switch in the
lamp relay circuit.
LAMP DOES NOT STRIKE (LERR, HOT)
The main reasons for lamp failure are a blown lamp, a hot lamp, and incorrect power
settings. Discharge lamps become harder to strike with use - an incorrect power setting
may not be immediately apparent. Check the settings, allow the lamp to cool, and/or try
another lamp. If this does not help, the problem may be one of the following.
No power to the lamp: Turn the lamp on from the control panel. If you can hear the lamp
relay “click”, the door switch is closed and the control circuit is working. If the relay does
not close, check the door switch first.
Defective phase compensation capacitor: A bad phase compensation capacitor (the two
large capacitors next to the ballast) will result in increased input current and may cause the
main fuses to blow when striking the lamp.
Defective ballast: You can test the ballast with an inductance meter if you have one.
Disconnect the fixture from power, remove the brown wire, place the common probe on the
neutral terminal, and place the hot probe on an input terminal. A good ballast will provide
readings very close to those shown below.
Lower readings mean the ballast is providing too much current and the higher readings
mean the ballast is providing too little current. Note that the measurement will be too low if
the brown wire is connected.
If you don’t have an inductance meter, test the fixture with a known good ballast before
replacing .
Defective starter: The specified starter output is 5000 to 7000 V. Never attempt to
measure the starter output with normal meters! The high voltage is dangerous and will
damage your equipment.
Replace the starter if the lamp still does not strike after eliminating other causes.
Lamp does not fit: The MAC 2000 uses a new version of the HMI 1200 W/S that has
keyed slots on the ends instead of threads. Forcing the wrong lamp into the holder will
cause problems.
Open door switch: An open door switch opens the lamp relay and/or prevents it from
closing. Make sure the lamp access plate is fully seated.
Open thermal switch: The MAC 2000 has two thermal switches in series with the lamp.
A defective switch or poor connection can cause lamp strike failure.
SHORT LAMP LIFE
Incorrect power setting: Lamp life will be shortened considerably if the ballast setting is
incorrect and the voltage is too high. Refer to the user manual for proper setting
information.
Setting Inductance
208 V / 60 Hz 28 mH
208 V / 50 Hz
32 mH
230 V / 60Hz
230 V / 50 Hz 39 mH
245 V / 50 Hz 42 mH
230V/60Hz230 V / 60 Hz
230V/50Hz230
V / 50 Hz
245V/50Hz245
V / 50 Hz
208V/60Hz208
V / 60 Hz
208V/50Hz208 V / 50 Hz
(28 Seiten)
(40 Seiten)
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