145
23
24
25
26
C
N
H
N
24V Themostat
Check the wiring of Thermostat.
Is Thermostat at the same time
230V and 24V wiring?
Only one wiring of 230V or 24V.
Check the Cooling / Heating wiring has been
duplicates to each Thermostat.
Cooling
Heating
19
20
21
22
C
N
H
N
230V Themostat
Cooling
Heating
Yes
No
4-4-97 Thermostat Wiring Error
Indoor unit display
Cause of problem
• Thermostat wiring error of xxx Hydro Unit.
Criteria
• Heating / Cooling signal of Thermostat at the same time input.
Outdoor unit display
↔ XXX (xxx : Address of Indoor Unit that error occurred)
1. Inspection Method
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