Troubleshooting by Indication on the Remote Controller ESIE09-05
198 Troubleshooting
3.29 “JA” Outdoor Unit: Malfunction of High Pressure Sensor
Remote
Controller
Display
JA
Applicable
Models
ERQ 125 ~ 200 A7V1
Method of
Malfunction
Detection
Malfunction is detected from the pressure detected by the high pressure sensor.
Malfunction
Decision
Conditions
When the high pressure sensor is short circuit or open circuit.
Supposed
Causes
Defect of high pressure sensor
Connection of low pressure sensor with wrong connection.
Defect of outdoor unit PC board.
Troubleshooting
∗1: Voltage measurement point
∗2: Refer to “Pressure Sensor”, pressure / voltage characteristics table on P234.
(V2806)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
The
relationship
between the ∗1
VH and high pressure
is normal (see ∗2) when
voltage is measured between
X17A pins (1) and (3) of
outdoor unit PC
board (A1P)
(see ∗1).
Replace the high pressure sensor.
Connect the high pressure sensor
and turn on again.
NO
NO
Replace outdoor unit PC board
(A1P).
YES
YES
The high
pressure sensor is
connected to X17A of
outdoor unit PC
board (A1P).
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