ESIE13-02
Error Codes: Outdoor Units
107
Part 4 – Troubleshooting
4
3
4
5
4
Troubleshooting
See also
"Check No.7 - Evaluation of Abnormal Low Pressure" on page 157.
"Check No.11 - Outdoor Unit: Check for Power Transistor" on page 160.
Replace the low pressure
sensor.
Measure the voltage
between the connector pins
(1) and (3) above.
(refer to *1)
Remove the thermistor from the
outdoor PC board and measure
resistance between the pins (5)
and (6).
Is the
relation
between low pressure
and voltage normal?
(refer to *2)
Is
the heat
exchanger distribution
pipe thermistor (connector :
X12A) properly connected
to the outdoor PC
board?
Is the
pressure sensor
(connector X17A)
properly connected to the
(A1p) PC board?
* Replace the outdoor PC board (A1P) ERHQ***V3* / ERLQ***V3*
* Replace the Control PC board (A1P) ERHQ***W1* / ERLQ***W1*
Correct the refrigerant system defect
NO
NO
YES
YES
NO
Connect the connector properly.
NO
NO
NO
YES
(In cooling operation)
Open the stop valve.
NO
YES
YES
Is the
stop valve open?
Is it in
cooling operation?
Is low
pressure
abnormally low?
Check 7
Replace the group thermistor.
Replace the low pressure
sensor.
Is it
normal?
Check 11
[* Replace the PC board equipped with resin case.]
