Defrost cycle (timed)

Defrost cycle (timed) The ice which is produced on the outdoor coil during the heating cycle must be eliminated when it begins to block the coil. The defrost cycle begins after a period selected between 30, 60 & 90 minutes from the start-up or the last defrosting, and when the evaporation temperature drops to -5°C or less. The logic module activates the defrost relay, which: - Activates the 4-way valve to go into the cooling cycle. - Switches off the outdoor fan. The defrost cycle finishes when the liquid temperature is sufficiently high, measured by a thermistor 13°C, or when, if it does not heat up, it reaches a minimum of 7°C for a 5 minute period; also after 12 minutes from its beginning. When the defrost cycle finishes, the logic module disconnects the defrost relay, reestablishing normal operating conditions of the heating cycle. If the unit tries to go into another defrost cycle in less than 5 minutes, the logic module switches it off, leaving the system