Toshiba RAS-18UFHP-E4 Service Manual page 36

7-6-1. Defrost starting condition
A-Zone : If -10°C > Teo ≥ − 18°C, defrost will
start when.
Teo - Te ≥ 2.5°C at teat 20 sec or
~ 30 min after operation.
B-Zone : If Te ≤ −18°C, defrost start instantaneously
(Suddenly) 00 ~ 25 min ofter operation
C-Zone : If -2ºC ≥ Teo ≥ −10°C defrost will start when
Teo - Te ≤ −3°C at least 20 sec or ~ 60 min
after operation.
7-6-2. Defrost finish condition.
1) If Te ≥ 3°C at least 60 sec -->4 way value on.
2) If Te ≥ 8°C --> 4 way value on.
Timing
Start time record
Defrost time rate : (Td/Tt) x 100
Heating time rate : (Tt - Td) x Tt
35 -
-
FILE NO. SVM-05015
Operation time (4 Loops = Tt)
Td1 Td2 Td3
Finish time record
Fig. 7-6-2
Td4