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FILE NO. SVM-07008
Measure gas pressure.
Gas shortage
Pipe clogging
Thermo operation of compressor
Gas circulation amount is down.
Gas leak
11-5-2. Wiring Failure (Interconnecting and serial signal wire)
(1) Outdoor unit does not operate.
1) Is the voltage between indoor terminal block 2 and 3 varied?
Confirm that transmission from indoor to outdoor is correctly performed based on the following diagram.
NOTE:
• Measurement should be performed 2 minutes and 30 seconds after starting of the operation.
• Be sure to prepare a diode for judgment.
Normal time : Voltage swings between DC15 V and 60 V.
Abnormal time : Voltage does not vary.
(2) Outdoor unit stops in a little while after operation started.
<Check procedure> Select phenomena described below.
1) The outdoor unit stops 10 to 20 minutes after operation started, and 10 minutes or more are
required to restart the unit.
2) If the unit stops once, it dose not operate until the power will be turned on again.
3) The outdoor unit stops 10 minutes to 1 hour after operation started, and an alarm is displayed.
(Discharge temp. error check code 03, 1E Sensor temp. error check code 02, 1C)
To item of compressor does not operate.
Gas leak
P.M.V. is defective.
Miswiring of connecting wires of indoor/outdoor units
Clogging of pipe and coming-off TC sensor
Refer to the chart in 10-6.
2
1
3
Terminal block on indoor side
S5277G
Terminal block
Tester
S5277G or equivalent (G or J type)
(Diode with rated voltage of 400 V
or more is acceptable.)
Red
White