Troubleshooting
5-2-4 When the compressor is not operated
1)Check points
(1)Is the voltage of the power source normal ? (the rating voltage ±10% range. )
(2)Is the desired temperature lower than the indoor temperature in the “COOL” mode? (Compressor stopped)
(3)Is the starting condenser in good contact?
(4)Is the electric wire in good contact ? (CN71, RY71)
(5)Is the output voltage of the IC01(KA7812) and IC02(KA7805) normal ?
Turn off the power, and then turn it on again five
seconds later.
N
Dose the Buzzer sound, when the power on?
Y
Check whether the "COOLING ICON" LED lamp is on | N |
and the operation starts when pressing the on/off |
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| |
button of the remocon. |
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Go to the clause "No power".
•Go to the clause "when he remocon does not operate".
Y
Check whether the compressor is activated in three | Y | ||
minutes after turning on the power with the "CoolING | |||
| |||
ICON" LED lamp being switched on when selecting the |
|
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cool mode of the remocon. |
| ||
|
|
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Normal operation.
N
Is the IC03 output normal?
- When the compressor is on, IC03 No. 13 pin → Low.
Y
Does the relay(RY71) operate normally?
- When the compressor is ON, the RY71 should operate.
Y
Is the compressor normal?
Y
Replace the compressor.
N
N
N
•Check the IC03 for short and cold soldering.
•Replace the IC03.
•Check the relay coil resistance. (resistance : About 150Ω ±20Ω )
•Replace the relay.
•Check the operation of the O.L.P, and replace it if necessary.
•Check the compressor
resistance.(0Ω : short, ∞Ω : open)
FRIEDRICH AIR CONDITIONING CO. |
