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Outdoor Eeprom Malfunction; Outdoor Ipm Over Current Or Short Circuit - Haier 2U18MS2VHB Service Manual

Ductless multi-split heat pump, outdoor/indoor, wall mount - highwall, 2'x2' compact cassette, 3'x3' large cassette, slim duct, mid-static ducted, medium static ducted, console
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[1] Outdoor EEPROM Malfunction

EEPROM communication error; EEPROM data check
error (model ID, checksum, etc.); EEPROM data logic
error (wider data range, wrong order, etc.)
Possible causes:
• EEPROM is bad
• Loose EEPROM wiring

[2] Outdoor IPM over current or short circuit

Input over current detected by PIM's hardware.
Possible causes:
• The IPM is bad
• Loose compressor wire
• The compressor is bad
J-20
Flow Charts
Topic Title
Is electric box wiring correct,
and is compressor wiring firmly
connected?
Is compressor normal
(compressor coil resistor,
insulation)?
3U24EH2VHA
Is power module normal?
Solve or correct any
failures according to
relative information
TROUBLESHOOTING & REFERENCES
Code disappears after
power off/on again
No
Check outdoor
PCB, If faulty,
replace it.
No
Yes
No
Replace compressor
Yes
No
Replace power module
Yes
Correct the wiring

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