Electra DNG 18 Service Manual page 71

CONTROL SYSTEM
III.Cases for disabling thermistor short/disconnected detection
i. The detection of thermistor faults (a) and (b) above, are
Deicer Protection is started. The detection will be enabled again only after the
deicing is completed, and COMP has been restarted and operated for 30 sec.
ii. When all the following conditions are fulfilled:
a. 4.7K Ohm resistor is connected on the OCT
b. IFAN is OFF
c. Compressor is ON
d. ICT < -30 (disconnected)
IV.General features
1) Allowed (control target) range for RAT is SPT +/- 1
2) Whenever the unit is changed from Cool/Dry/STBY mode to Heat mode
or vice versa, the procedures below are followed:
Stop COMP for 3 min o Change RV state o Start COMP if necessary.
13-8
o
Revision Y05-01
CONTENT
disabled when
c.
Service Manual - DNG Series