Defrosting Mode(Available For Heating Mode) - Heat Controller SMA Service Manual

9.8.5 Anti-cold wind control function at heating mode (T=indoor exchanger temp.)
9.8.6 Auto wind at heating mode (T=indoor temp.)
9.8.7 Indoor evaporator high-temperature protection at heating mode
(T=indoor exchanger temp.)
The louver opens to Standard Angle ANGLHEAT when power is on for the first time

9.9 Defrosting mode(available for heating mode)

9.9.1 Defrosting condition:
Defrost starts when either of the following 1&2:
1. T3 lower than 32ºF for more than 40 minutes, and during this period T3 is lower than 27ºF
for 3 minutes.
2. Time from the end of last defrost where the compressor was running add up to 90 minutes.
Service manual
N 3.6ºF
Heat Controller, Inc. Jackson, MI 49203
- 35 -