Defrost Control - Toshiba RAV-SP454ATP-E Service Manual

10. Defrost control

<SP40 to SP56 only>
1) In heating operation, defrost operation is performed when TE sensor satisfies any condition in A zone to D
zone.
2) During defrosting operation, it finishes if TE sensor continued 12°C or continued 5°C ≤ TE < 12°C for
80 seconds. The defrost operation also finishes when it continued for 15 minutes even if TE sensor
temperature was 5°C or lower.
3) After defrost operation was reset, the compressor stopped for approx. 40 seconds and then the heating
operation starts.
Start of heating operation
TE [˚C]
0
–4
–6
–10
–25
∗ The minimum TE value and To value between 10 and 15 minutes after heating operation has started are
stored in memory as TE0 and To0, respectively.
A zone
B zone
C zone
D zone
SVM-12085_001-050.indd 43 SVM-12085_001-050.indd 43
10 15 29 35
∗
n I n r o m l a T
When status (TE0 – TE) – (To0 – To) ≥ 3°C
c o t n n i u e d f r o 2 0 s
When status (TE0 – TE) – (To0 – To) ≥ 2.5°C
c o t n n i u e d f r o 2 0 s
When the status (TE ≤ –26°C) continued for 20 seconds
When the status (TE ≤ –10°C) continued for 20 seconds
A zone A zone
B zone B zone
C zone C zone
o
e c o n d s
When status (TE0 – TE) ≥ 2.5°C
e c o n d s
– 43 –
FILE NO. SVM-12085
91
D zone D zone
n I a b n r o m l a T o
When status (TE0 – TE) ≥ 3°C
c o t n n i u e d f r o 2 0 s e c o n d s
c o t n n i u e d f r o 2 0 s e c o n d s
[min.]
12/06/12 11:06 AM 12/06/12 11:06 AM