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Servicing Information
(a) Current Transformer Defective
When the Current Transformer (CT) is an open circuit, total running current is less than 1.88 A and the indicated
frequency is 72 Hz (CU-G90KE) or 78 Hz (CU-G120KE) or above. After 3 minutes of operation, the abnormality
signal is sent from outdoor to indoor and [H16] is displayed.
(b) 4 Way Valve Defective
i. Heating Operation (except Deice)
After 4 minutes of operation, the indoor heat exchanger temperature is lower than 5°C. The operation stops
and restarts after 3 minutes. If this phenomenon occurs for 4 times within 40 minutes, [F11] is displayed.
ii. Cooling Operation
After 4 minutes of operation, indoor heat exchanger temperature is higher than 45°C. The operation stops
and restarts after 3 minutes. If this phenomenon occurs for 4 times within 40 minutes, [F11] is displayed.
The abnormality judgement is not carried out, in the following conditions:
– deice operation
– 2 minutes after deice operation
– hot start
– 2 minutes after hot start
– 3 minutes after heating and cooling/soft dry mode changeover
– 56 –
CS-G90KE
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