Model 5210D User’s Manual
Doc. SE-MAN-050 REV 00
Page 15 of 25
©2017 Perma Pure LLC. All rights reserved. Specifications subject to change.
TROUBLESHOOTING AND MAINTENANCE GUIDE
Troubleshooting and repair should only be attempted by qualified personnel;
Review Safety Warnings Page for more complete details of potential hazards
Inside the enclosure there are lethal AC voltages, 15VDC power at 12 amps, as well as exposed rotating fan
blades and other potentially hazardous components.
ALWAYS USE CAUTION! DEENERGIZE EQUIPMENT PRIOR TO ATTEMPING SERVICE!
The status board will indicate what the on-board computer
thinks
is happening.
Verify that the unit has commanded the response before going in to verifying hardware. For example, verify the
board indicates that the pump relay is closed before physically pulling the relay.
Peltier Elements
Troubleshooting Peltier elements can be difficult at the part level without specialized equipment. A conventional
Ohm Meter will not provide useful information. Peltier failure or degradation can be indicated by
current measurement. The measurement should be made during the first few minutes of start-up. For a 5210D,
the Peltier elements are wired in parallel, with each drawing between 6 and 9 amps. Unit-to-unit variation, such as
exact voltage, wire run length, ambient temperature, and cooler temperature, can generate some variation. This
test can also be performed by placing a DC inductive ammeter around the black or white leads coming off JP10 or
JP11.
12VDC Cooling Fan
There are two regulated outputs for the 12VDC cooling fans, one is thermostatically controlled by the control
board for enclosure component cooling. The 12VDC cooling fans on a 5210D should be wired to the designated
12VDC output of the board. Care should always be taken to avoid rotating blades!