Manufacturer of Quality Air Conditioning and Heating Products • www.islandaire.com • sales@islandaire.com • (800)-886-2759
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Diagnostic & Error Codes
Control Panel Display Diagnostics
Sensors in the unit continually monitor the indoor coil, outdoor
coil, and outdoor air conditions. If abnormal conditions are
detected, an error code is displayed removing the guess work in
troubleshooting a unit.
Error Codes
ERROR CODE
DIAGNOSIS
CAUSE
NOTE
E2
RETURN AIR (RA)
TEMPERATURE SENSOR FAILURE
RA SENSOR BROKEN OR LOOSE AT BOARD CONNECTION
UNIT OPERATION DISABLED
E3
INDOOR COIL (IDC)
TEMPERATURE SENSOR FAILURE
IDC SENSOR LOOSE OR BROKEN AT BOARD CONNECTION
UNIT OPERATION DISABLED
E5
OUTDOOR COIL (ODC)
TEMPERATURE SENSOR FAILURE
UNIT OPERATION DISABLED
E8
ODC SENSOR BROKEN OR LOOSE AT BOARD CONNECTION
UNIT OPERATION DISABLED
E9
OVERHEAT / FREEZE PROTECTION
• REFRIGE
RANT RESTRICTION
• DI
RTY FILTER / EVAPORATOR COIL
•
FAILED EVAPORATOR MOTOR
• RETURN SUPP
LY AIR RESTRICTED
UNIT OPERATION DISABLED
SYN. FAULT TERMINALS OPEN
HIGH PRESSURE SWI
TCH OPEN:
• DIRTY CONDENSER COIL (COOLING)
• FAILED CONDENSER MOTOR (COOLING)
• ENSURE BAFFLES ARE INSTALLED (IF REQUIRED)
• REFRIGERANT RESTRICTION
• DIRTY FILTER / EVAPORATOR COIL (HEAT PUMP)
• EVAPORATOR MOTOR FAILURE (HEAT PUMP)
• ALL ADDITIONAL SAFETIES TIED TO SYN. FAULT TERMINALS
SHOULD BE CHECKED
Display - Error Code
Figure 46
AUTO
POWER
MODE
FAN
SPEED
LOW
HIGH
FAN
HEAT
COOL
WARM
COLD
E2