MAINTENANCE
HySpeed HT2000LHF Instruction Manual 5-9
6
Problem Possible Causes / Solutions
Status LED Troubleshooting
Be certain that the power supply has been through the Initial Checks as outlined earlier in this section before
troubleshooting STATUS LEDs.
When any one of the STATUS LEDs illuminates, there is a fault condition that must be corrected in order for the
HT2000LHF power supply to become operational. See Section 7 in this manual for reference.
1. INTERLOCK LED illuminated: This LED should never illuminate. Call the Technical Services
department listed in the front of this manual if this LED
illuminates.
2. TRANSFORMER LED illuminated: 2.1. Main Transformer T2 or one of the choppers is overheating.
This LED will extinguish when the main transformer (T2) is
operating in a normal temperature range (under 165° C
(329° F)) and choppers CH1 and CH2 are also operating in
a normal temperature range (under 82° C (180° F)).
• Check the temperature switches (normally closed).
• Check pins, connectors and wiring to temperature
switches.
• Leave the fans running, and try restarting the unit after
one hour. If LED still illuminates, one of the choppers or
the main transformer may need to be replaced.
3. COOLANT LEVEL LED illuminated: 3.1. Coolant level is low.
This LED will extinguish when a proper coolant level in the
coolant reservoir is maintained. Level switch LS1 is located
in the coolant reservoir, and will open when it senses that
coolant level is too low.
• Check the coolant level.
• If the coolant level is adequate, check to see if LS1 switch
is closed.
• Check connections and wiring from LS1 to PCB1.
Repair and/or replace defective component(s), if necessary.
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