Daikin EUWY 24KBZW1 Series, Руководство по обслуживанию

Страница: 192 / 210

Pre-Test Run Checks ESIE11-02
4–26 Part 4 – Commissioning and Test Run
3
1
4
5
The valve starts to
shift but does not
complete the
reversal. Check the operation conditions in the table below to find the cause of the malfunction.
The procedure to solve the problem is described in the last column.
See the illustration to situate the numbers in the table heading.
1 2 3 4 5 6 Cause Procedure
Hot Warm Warm Warm Temper-
ature of
valve
body Hot There is not
enough pressure
differential at
start of stroke or
not enough flow
to maintain the
pressure
differential. 1. Check the unit for correct
operating pressure and
charge.
2. Raise the head pressure.
3. If there is still no shift,
replace the valve.
There is body
damage. Replace the valve.
Hot Warm Warm Hot Hot Hot Both parts of the
pilot are still
open. 1. Raise the head pressure.
2. Operate the solenoid to
free the partially clogged
port.
3. If there is still no shift,
replace the valve.
Hot Hot Hot Hot Temper-
ature of
valve
body Hot There is body
damage. Replace the valve.
The valve is
hung up at
mid-stroke. The
pumping vol-
ume of the com-
pressor is not
sufficient to
maintain the
reversal. 1. Raise the head pressure.
2. Operate the solenoid.
3. If there is still no shift,
replace the valve.
Hot Hot Hot Hot Hot Hot Both parts of the
pilot are still
open. 1. Raise the head pressure.
2. Operate the solenoid to
free the partially clogged
port.
3. If there is still no shift,
replace the valve.