Service Manual

GSM-204-523
General maintenance procedures
31st Oct 01
Maintenance Information: Horizon macro outdoor
68P02902W04-A
CONTROLLED INTRODUCTION
Maint. 2–9
TMS Test procedure
CAUTION Do not operate the unit in this position for more than 4
minutes, otherwise damage to the electronic equipment
may occur.
Figure 2-1 shows the layout of the alarms interface board and shows the
position of the TMS test switches.
PL1 PL3
INTERNAL FANS
(SW3)
TEST OVERRIDE
(SW1)
HEATER ON
(SW2)
EXTERNAL FANS
(SW4)
PL4
PL5
PL2
PL8
PL6PL7
Figure 2-1 Layout of alarms interface board and TMS test switches
1. Open the power supply enclosure (right) cabinet door.
2. Press and hold the test override switch and check that the four fans are
rotating at minimum speed and the heater LED is off.
3. Press the internal fans switch and check that both recirculation fans
increase speed.
4. Release the internal fans switch and check that both recirculation fans
return to minimum speed.
5. Press the external fans switch and check that both ambient air fans
increase speed.
6. Release the external fans switch and check that both ambient air fans
return to minimum speed.
7. Press the heater switch and check that the heater LED is lit.
8. Release the heater and test override switches.
9. Close the cabinet doors and verify (by listening) that the TMS recirculation
fans are operating.
NOTE
In step 9 ambient air fans may also run, depending on site
conditions.