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68
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11-5-2. Wiring Failure (Interconnecting and Serial Signal Wire)
(1) Outdoor unit does not operate
1) Is the voltage between
d
and
e
of the indoor terminal block varied?
Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon 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 and 60V. .................. Inverter Assembly check (
11-5-1.
)
Abnormal time : Voltage does not vary.
(2) Outdoor unit stops in a little while after operation started
<Check procedure> Select phenomena described below.
1) If the unit stops once, it does not operate until the power will be turned on again.
2) 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)
Red
White
Terminal block
S5277G
Tester
3
2
1
Terminal block at indoor side
S5277G or equivalent (G or J type)
(Diode with rated voltage of 400V
or more is acceptable.)
To item of Outdoor unit does not operate.
Refer to the chart in 11-6.
Gas leak
PMV is defective.
Mis-wiring of connecting wires of indoor/outdoor units
Clogging of pipe and coming-off of TC sensor
FILE NO. SVM-12053
