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1. Error Code
1302
Abnormal high pressure 1
2. Error definition and error detection method
1) If a pressure of 3.23MPa [468 psi ] or higher is detected during operation, units will stop, go into the 3 minute restart
delay mode, and automatically restart after three minutes.
2)
If a pressure of 3.23MPa [468 psi ] or higher is detected again (second detection) within 30 minutes of the first stoppage
of the units, units will stop, go into the 3 minute restart delay mode, and automatically restart after three minutes.
3)
If a pressure of 3.23 MPa [468 psi ] or higher is detected again (third detection) within 30 minutes of the second stoppage
of the units, the unit will come to an abnormal stop, and the check code "1302" will appear on the display.
4)
If a pressure of 3.23MPa [468 psi ] or higher is detected after 30 minutes have elapsed after a stoppage of the units, it is
regarded as the first detection, and the sequence as described in section 1) above is followed.
5)
Preliminary error code will remain on the LED for 30 minutes after the stoppage of the uinit.
6)
The outdoor unit makes an error stop immediately when not only the pressure sensor but also the pressure switch detects
+0,-0.15
+0,-22
3.60
MPa [522
3. Cause, check method and remedy
(1) LEV actuation failure
(2) Pressure sensor failure
(3) Failure of the thermistor input circuit and pres-
sure sensor input circuit on the controller board
(4) D
isconnected male connector on the pressure
switch (63HS) or disconnected wire
(5)
Shortage of circulating water
1. Error Code
1302
Abnormal high pressure 2 (outdoor unit)
2. Error definition and error detection method
If the pressure of 0.098MPa [14psi] or lower is registered on the pressure sensor immediately before
start-up, it will trigger an abnormal stop, and error code "1302" will be displayed.
3. Cause, check method and remedy
(1)
Inner pressure drop due to a leakage.
(2)
Pressure sensor failure
(3)
Shorted-circuited pressure sensor cable due to torn
outer rubber
(4)
A pin on the male connector on the pressure sensor
is missing or contact failure
(5)
Disconnected pressure sensor cable
(6)
Failure of the pressure sensor input circuit on the
controller board
psi]
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m
Refer to the section on troubleshooting the
LEV.(page 63)
R
f e
r e
o t
h t
e
p
a
ge on the troubleshooting of the high
pressure sensor. (page 60)
Check the temperature and the pressure of the sensor
with LED monitor.
Ch
eck the temperature and the pressure of the sensor
with LED monitor.
Check that the pump meets the required specifications.
3
3
0.6m
/h~2.15m
/h
C
h
e
k c
Refer to the page on the troubleshooting of the
high pressure sensor.(page 60)
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Table of Contents
Troubleshooting
