-60-
L–
a
=0 (fan stops)
2 m i n u t e s a n d
2 0 s e c .
1 2 0 s e c .
3 0 s e c .
C o m p r e s s o r O N
O F F
O u t d o o r f a n H
L –
a
* W h e n t h e o u t d o o r f a n H i s r e s t r i c t e d t o ( H –
a
) i n t h e h i g h
*
t e m p e r a t u r e r e l e a s e , H i n t h e a b o v e f i g u r e i s ( H –
a
).
<Outdoor unit
control>
LED lamp comes on
in abnormal
condition, with
abnormal code
transmitted to indoor
unit.
When stoppage takes place in [HEAT 2] operation, indoor fan is operated in
[LOW] for 30 sec.
If Remote controller's ON/OFF switch is pressed 5 seconds continuously, the
unit goes into test run mode with the indoor fan in the [HIGH].
The following control is performed when high pressure switch of the outdoor unit
is actuated.
In cooling operation
Compressor is turned off and if the high pressure switch does not reset for 5
seconds continuously thereafter, it is judged abnormal.
In heating operation
Compressor is turned off and if the high pressure switch does not reset for
30 seconds continuously thereafter, it is judged abnormal. If the switch
resets within 30 sec., the compressor restarts 2 minutes and 20 sec. later
and operates according to the diagram below.
In defrosting operation
Compressor is turned off, the operation returning back to heating operation.
12-1 In heating operation, defrosting
12-1
is made based on outdoor heat
12-1
exchange temperature Te.
12-2 When cumulative working time
12-2
of the compressor in [A] zone
12-2
has amounted to 55 minutes,
12-2
defrosting operation starts.
12-2
(25 minutes initially)
12-3 The longest defrosting time is
12-3
12 minutes, 60 sec. in the case
12-3
of turning into [B] zone, and
12-3
immediate returning back when
12-3
[C] zone is reached
If the high pressure SW continues to operate for 5 seconds while the
compressor is stopping, fusing of Mg-SW is detected and the outdoor fan
is controlled as described below.
When the four-way valve is OFF (including during defrosting operation)
Turn ON the outdoor fan using “H”.
When the four-way valve is ON
Turn OFF the outdoor fan.
(When the compressor is stopping, the outdoor fan should be OFF)
The following control shall be performed when the compressor stops:
The 4-way valve in the hold state shall be reversed 10 seconds before the restart
delay timer counts the maximum count (2 minutes 20 seconds).
After the restart delay timer counts the maximum value, the specified mode shall
be selected.
<Outdoor unit
control>
NO.
ITEM
OUTLINE OF SPECIFICATIONS
REMARKS
8
Residual heat
removal
9
Test operation
10
High pressure
release
11
Protection at the time
of Mg-SW fusing
12
Defrosting
13
Four-way valve
reversal control
Heronhill - for all your Toshiba requirements
Tel: 01823 665660
www.heronhill.co.uk
Fax: 01823 665807
