Soleus Air KFHHP-22 service manual Time-delay protection of compressor, Defrosting process

during heating process, when Tset	(Tin-amb-3)	(Tset +2) ,the compressor operates
in low frequency.
during heating process, when (Tin-amb-3)	(Tset +2) , then compressor stops running. And

outdoor fan motor stops in 60s.

Notice: It will take 2 minutes to power-off in 4-way valve when the unit closes down in heating mode or switch from heating mode to other modes.

In this mode, there is power supply for reversing valve. Range of temperature setting is 16-30 .

6.1.2.4.2 Controlling principles of outdoor fan motor

If Tout-amb		19	, the fan motor runs in high speed.
If Tout-amb		21	, the fan motor runs in low speed.
If 19	Tout-amb		21 , the fan motor runs in original speed.

After fan motor runs in compulsive high speed for 3 minutes in starting-up, then the speed will be controlled by the set principles

6.1.2.4.3 Defrosting process

When defrosting conditions is detected, if compressor run in high frequency, then frequency will be demultiplied first. Later compressor stops running and indoor fan motor stops. Outdoor fan motor stops in 50s later. 4-way valve will be power-off in 45s. The defrosting functions operates when compressor restart in 55s and frequency reaches 90hz. When the defrosting is over, the frequency will drop until it reaches 60hz. 50s later 4-way valve and outdoor fan motor will be power-on.Then frequency of compressor will rise to the required. But indoor fan motor have to start 2 minutes later at least.

If compressor closes down for malfunction in heating mode, indoor motor will only exhausting remaining heat.

6.1.3Universal protection function of cool, heating, dehumidifying and auto

mode

6.1.3.1 Overloading protection function

When over-high temperature of tube (Ttube) is detected, frequency of compressor will be demultiplied or limited. When Ttube is beyond maximum, compressor stops until Ttube restrores to normal value.

If there are 6 continuous times of over-high Ttube protection, compressor will stop and can not restart by itself. It can only be restart by pressing “ON/OFF” button. In operation if operating time of compressor is over 7 minutes, the number of times will be zero cleared.

6.1.3.2 Time-delay protection of compressor

Compressor will restart in 3 minutes after it closes down.

6.1.3.3 High exhausting gas temp. protection of compressor

When over-high temperature of gas exhausted (Tex) is detected, frequency of compressor will be demultiplied or limited. When Tex is beyond maximum, compressor stops until Ttube restrores to normal value.

If there are 6 continuous times of over-high Tex protection, compressor will stop and can not restart by itself. It can only be restart by pressing “ON/OFF” button. In operation if operating time of compressor is over 7 minutes, the number of times will be zero cleared.

6.1.3.4Current protection function

(1) overcurrent protection

If current of whole unit is beyond max. limit, unit will close down as if indoor temperature reaches the set temperature. Unit will restore automatically after compressor has been stop for 3 minutes.

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