Airwell YCV280, Installation And Maintenance Instructions Manual

Page: 370 / 412

23 35-1
24 36
25
37-1
27
39-0
after compressor is running, compression ratio>8
.
for
continuous 5 minutes stop and alarm. 2 minutes and 50
seconds later, resume automatically, if it occurs 3 times
in an hour, confirm the failure.
39-1
27
in normal operation, compression ratio<1
.
for continuous
5 minute,s stop and alarm. 2 minutes and 50 seconds
later, resume automatically, if it occurs 3 times in an
hour, confirm the failure.
27 39-2
28 40
35-2
23
37-2
37-3
digital
tube
indication
on master
unit
indication
on wired
controller
(hex)
failure
code
definition
failure description remarks
4-way valve
reversing
failure
after 4-way valve is electrified for 3 minutes, if the below
conditions can be met for continous 10 seconds, that is
conversing successfully:
1. this outdoor compressor is running normally
2. Tsuc-Tdef
>=
10
¡
or Pd-Ps
>=
0.6MPa
Otherwise, the system alarms reversing failure.
once
confirmation
, un-
resumable
once
confirmation
, un-
resumable
once
confirmation
, un-
resumable
once
confirmation
, un-
resumable
once
confirmation
, un-
resumable
oil temp. too
low protection
(Toil)
in normal operation, if
T
d<CT+10
¡
for continuous 5
minutes, the unit stops and alarms.2 minutes and 50
seconds later, resume automatically. If it occurs 3 times
in an hour, confirm the failure
lack of phase of
3N power supply
or wrong phase
sequence
lack of S-phase
low pressure
sensor Ps too
low protection
after compressor is running (except for residual
operation), if in cooling, Ps<0.10Mpa; in heating,
Ps<0.05Mpa; in oil return, Ps<0.035Mpa for continuous
5 minutes, alarm and stop. 2 minutes and 50 seconds
later, resume automatically, if it occurs 3 times in an
hour, confirm the failure.
compression
ratio too low
protection
compression
ratio too high
protection
high pressure
sensor Pd too
high protection
in normal operation, Pd>=4.15Mpa for continuous 50ms,
alarm and stop. 2 minutes and 50 seconds later, resume
automatically, if it occurs 3 times in an hour, confirm the
failure.
4-way valve
reversing
failure
in heating mode, if 4-way valve can not be electrified
within 20 minutes, alarm 4-way valve failure.
lack of T-phase
S and T are normal, but phase sequence is opposite
376