koppel KV 24CC-ARF21, Service Manual

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Electrical Control Function
When T4 <15
℃
and T3 < 30
℃
, the unit will enter into low ambient cooling mode. The outdoor fan will
choose speed according to T3.
When T3 ≥ 38 ℃ or when T4 ≥ 20 ℃ , the outdoor fan will choose the speed according to T4 again.
1.3.2.3 Indoor fan
operation rules
In cooling mode, indoor fan runs all the time and the speed can be selected as high, (medium), low and auto.
The auto fan:
5.0
4.0
High
Low
2.0
Medium
3.0
1.3.2.4 Evaporator low temperature T2 protection.
When T2<2
℃
and lasts for 3 minutes, the indoor has no capacity demand and resume till T2
≥
7
℃
.
1.3.2.5 Condenser high temperature T3 protection
When T3>65
℃
for 3 seconds, the compressor will shut off. When T3
＜
52,the compressor will restart.
1.3.3 Auto-mode
This mode can be chosen with remote controller and the setting temperature can be changed between
17~30
℃
.
In auto mode, the machine will choose cooling, heating or fan-only mode according to ∆ T ( ∆ T =T1-Ts).
∆ T=T1-Ts Running mode
∆ T
≥
2
℃
Cooling
∆ T<2 ℃
Fan-only
Indoor fan will run at auto fan of the relevant mode.
The louver operates same as in relevant mode.
If the machine switches mode between heating and cooling, the compressor will keep stopping for 15
minutes and then choose mode according to T1-Ts.
If the setting temperature is modified, the machine will choose running function again.
1.3.5 Drying mode
Drying mode works the same as cooling mode in low speed.
All protections are active and the same as that in cooling mode.
1.3.6 Timer function
1.3.6.1 Timing range is 24 hours.
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