Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 28

(10) Base heater ON/OFF output control (Option)
(a) Base heater ON conditions
When all of following conditions are satisfied, the base heater is turned ON.
・ Outdoor air temperature (detected with Tho-A) is 1ºC or lower.
・ In the heating mode
・ When the compressor is turned ON
・ JSW1-4 is OFF.
(b) Base heater OFF conditions
When either one of following conditions is satisfied, the base heater is turned OFF.
・ Outdoor air temperature (detected with Tho-A) is 3ºC or higher.
・ When the compressor stop has been detected for 30 minutes continuously
・ In the cooling or dehumidifying mode
(11) Manual defrost (Need to activate SW4-4) *For maintenance only.
When unit is operated with SW4-4 ON, defrost operation will be activated in every 12 minutes.
Caution! This function is used for maintenance only.
Long term operation with this function will damage the compressor.
(12) Limit the number of compressor start (Need to activate SW7-2)
Maximum number of compressor start is to be limited up to 6 times per hour.
Base heater ON
1
Outdoor air temperature (ºC)
Base heater OFF
3
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'22 • PAC-SM-422