Diagnostic & Error Codes; Error Codes - Islandaire EZ GS Series Engineering Manual

Error Codes

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 CODE
RETURN AIR (RA)
E2
TEMPERATURE SENSOR FAILURE
INDOOR COIL (IDC)
E3
TEMPERATURE SENSOR FAILURE
OUTDOOR COIL (ODC)
E5
TEMPERATURE SENSOR FAILURE
E8 OVERHEAT / FREEZE PROTECTION
E9 SYN. FAULT TERMINALS OPEN
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DIAGNOSIS
RA SENSOR BROKEN OR LOOSE AT BOARD CONNECTION
IDC SENSOR LOOSE OR BROKEN AT BOARD CONNECTION
ODC SENSOR BROKEN OR LOOSE AT BOARD CONNECTION
• REFRIGERANT RESTRICTION
• DIRTY FILTER / EVAPORATOR COIL
• FAILED EVAPORATOR MOTOR
• RETURN SUPPLY AIR RESTRICTED
HIGH PRESSURE SWITCH 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
Figure 46
E2
CAUSE
49
Display - Error Code
FAN
POWER MODE SPEED
AUTO
LOW HIGH FAN HEAT COOL
WARM
COLD
NOTE
UNIT OPERATION DISABLED
UNIT OPERATION DISABLED
UNIT OPERATION DISABLED
UNIT OPERATION DISABLED
UNIT OPERATION DISABLED