Indicator Lamps Troubleshooting - Tadiran Telecom ANL-100 Service Manual

SKY

8.4 Indicator lamps troubleshooting.

Lamps Status
POWER flashes 10
1
seconds after A/C
startup (with or
without other signal
lamps).
POWER,
2
COMPRES. and
PRESSURE lamps
flash.
POWER,
3
COMPRES. and
IMPEDANCE
lamps flash.
POWER lamp
4
flashes and
PRESSURE is lit,
AIR CON is OFF.
POWER and
5
PRESSURE
lamps flash, AIR
CON is OFF.
6 FILTER is lit
POWER &
7
IMPEDANCE
lamps flash,
COMPRES. Is lit.
POWER lamp
8
flashes,
IMPEDANCE &
COMPRES.
lamps lit.
AIR CON lamp
flashes after A/C
startup.
Indication
Communication problem.
TH-1 failure.
TH-2 failure.
Low Pressure.
High Pressure.
Filter cleaning.
Low voltage.
Voltage failure at startup.
-
Corrective Action
Check connection between indoor and
outdoor units.
Check TH-1 for correct resistance.
Check for proper connection between
TH-1 and indoor unit.
Replace TH-1 if necessary.
Check TH-2 for correct resistance.
Check for proper connection between
TH-2 and indoor unit.
Replace TH-2 if necessary.
Check if the filters are clean.
Check TH-1 & TH-2 for correct resistance.
Check cooling system for normal
operation.
In Heat mode: Check if the evaporator is
blocked (check if filters are clean).
Check TH-2 (in Heating mode) or TH-3
(in Cool mode) for correct resistance.
Check cooling system for normal
operation.
Clean all filters.
Check power supply voltage.
Check electrical connections.
Replace TAC-444.
Check power supply voltage.
Check electrical connections.
Replace TAC-444.
42 -