Daikin ALTHERMA HT Service Manual page 162

Troubleshooting by Indication on the Remote Controller
Troubleshooting
Check No.1
150
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
Caution
Check for the points shown below.
 Is the stop valve open?
 Is the HPS connector properly connected to the indoor
PC board?
 Does the high pressure switch have continuity?
Are the three
NO
points above OK?
YES
Check for the points shown below.
 Are all water vaves open?
 Is water flow possible?
 Is water filter clean?
 Is the water circuit filled with water?
 Is all air removed from the water circuit?
Are the five
NO
points above OK?
YES
Has
YES
the thermal cut-out been
activated?
NO
• Mount a pressure gauge on the high-pressure service port.
• Connect the Service Tool.
• Reset the operation using the remote control, put power off for ~ 10 seconds and then restart the operation.
Does the stop
YES
due to malfunction (E3-12)
recur?
NO
Are the
characteristics of the
NO
high pressure sensor
normal? (See
*1.)
YES
Is the
NO
pressure detected with
the PC board normal?
(See *2.)
YES
The high pressure sensor is normal, and the pressure detected with the PC board is also normal.
•
The high pressure has really become high.
•
CHECK 1
Refer to "remove the causes by which the high pressure has become high".
: Refer to information on page 209.
Does the
NO
error reoccur after resetting
thermal cut-out?
YES
Is
the HPS
NO
operating value normal (i.e.,
4.0MPa)?
YES
ESIE09-08B
Rectify defective points, if any.
Rectify defective points, if any.
Rectify defective points, if any.
Replace the HPS.
Replace the high pressure
sensor.
Replace the PC board (A4P).
Troubleshooting