Fan Control - Promax FA-405 Manual

Problem
No display
No input possible
Attention: Except when this is possible manually, the opening of

4.5.2 Fan Control

1. The fan of the power supply will not work upon power on until the temperature
or load current reaches the condition as follows:
•
Temperature oriented:
When the temperature of the power supply reaches to range of 45 °C
for 5 to 6 seconds, the fan starts to work, while the temperature is less than
]
40 °C
•
Load current oriented:
After the load current reaches to the value 2.10A
on rolling when current reaches to the value 1.80A ± 50mA the fan will stop.
2. To avoid damaging the power supply, if the fan failed to work when the
temperature or current has reached to the specific condition, please power off
the instrument and contact our local distributor for service.
Page 14
Possible solution
• Is the instrument switched on?
• Is the AC power plug making good contact both in the instrument
and in the AC power socket?
• Is the AC fuse OK?
• "LOCK" or "REM"; key pressed; see under section 4.4.2 or 4.4.5
covers or removal of parts can expose voltage-
carrying components. Connection points may also be
live. Before any adjustment, maintenance, repair or
exchange of parts or assemblies requiring opening of
the unit, the unit must be disconnected from all voltage
sources and measurement circuits. If the adjustment
maintenance or repair is subsequently required for the
open unit, these must only be performed by a
specialist familiar with the associated hazards and
relevant regulations (VDE-0100, VDE-0701, VDE0683).
Capacitors within the instrument can remain charged
even when the unit has been disconnected from all
voltage sources and measurement circuits..
5°C the fan stops rolling.
USER'S MANUAL. FA-405
]
50mA the fan will keep
]
5°C
12/2003