Sharp JH-1600E Service Manual page 24

Action Replace a new solar power conditioner.
Error code
E-18
Description Ground fault.
Protection level ---
Activation time ---
Case.1 Cause PV array grounding fail.
Check Confirm PV array resistance between the PV + / - and GND. If the resistance
is lower 640Kohm, ask dealer to check PV array.
Action ---
Case.2 Cause Grounding test circuits fail.
Check Confirm resistance between PV + / - terminal and GND in wiring box of solar
power conditioner. If the resistance is lower 640kohm, the solar power
conditioner is damage.
Action Replace a new solar power conditioner.
Error code
d-20
Description Temperature sensor broken.
Protection level ---
Activation time ---
Case.1 Cause CNW5/CNW6 disconnect.
Check Confirm that CNW5 and CNW6 are connecting correctly or not. If loosely,
connect it and restart solar power conditioner.
Action Connect CNW5 and CNW6 tightly.
Case.2 Cause Thermal fuse broken.
Check Measure CNW5 and CNW6 resistance is open or not. If open, thermal fuse
broken.
Action Replace new AC or DC terminal. (CNW7 or CNW9)
Error code
E-21 (d-21)
Description Output over current / DC bus voltage transient over voltage / Utility voltage
transient over voltage
Protection level 9.5A
Recovery method : B
Recovery method : D
Recovery method : C
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