Applied Air GAS-FIRED HEATERS, Инструкция по установке и эксплуатации

Страница: 42 / 64

– 42 –
Symptom Cause Remedy
1. Check power source.
2. Replace
fuse(s).
3. Close or connect customer
interlock.
4. Enable the fan(s).
5. Close door, check and/or replace
switch.
6. See digital control system user
manual.
7. Check power source and/or
replace.
8. Check stat and settings, reset
by re-cycling the power.
Check sensor and location.
9. Check for power at damper
motor and that end switch has
been wired correctly. End
switch should be wired N.O.
(normally open). Clear
linkage.
10. Reset the starter by pushing
red button on starter, check
amp draw.
11. Turn power off and check
belts.
12. Turn power off and check
motor and wiring.
13. Check time clock and fi eld
installed controls for correct set-
tings and voltage.
14. Close switch (if applicable).
15. Turn power off and check
bearings.
16. See multiplex voltage value chart.
SECTION VII - TROUBLESHOOTING WITH DDC CONTROLS
A. Supply fan(s) do not
operate.
1. Low or no voltage.
2. Fuse(s)
blown.
3. Customer’s interlock not
closed or connected.
4. Fan is disabled.
5. Door switch open.
6. DO-1 on UC-01 not energized.
7. RE-57 contacts not closed.
8. Freeze protection tripped.
9. Damper motor not operating,
its end switch not making, or
dampers binding.
10. Overload protection on
motor starter tripped.
11. Belts loose or broken.
12. Motor may be burned or
incorrectly
wired.
13. Time clock or fi eld installed
controls not closed.
14. Auxiliary Unit Enable Switch
(SW-09) not closed.
15. Bearing seized on shaft.
16. Multiplexed voltage values not
correct.