Diagnostic Display Error Codes; Control Panel Display Diagnostics - Islandaire EZ Series 42 Engineer's 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 DiAgnoSiS
RETURN AIR (RA)
E2 TEMPERATURE SENSOR
FAILURE
INDOOR COIL (IDC)
E3 TEMPERATURE SENSOR
FAILURE
E4 ABNORMAL OPERATION
OUTDOOR COIL (ODC)
E5 TEMPERATURE SENSOR
FAILURE
SYN. FAULT TERMINALS
E9
OPEN
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cAuSe
RA SENSOR BROKEN OR LOOSE AT BOARD CONNECTION
IDC SENSOR LOOSE OR BROKEN AT BOARD CONNECTION
• CHECK PROPER LOCATION OF IDC SENSOR
AND ODC SENSOR
• ENSURE THAT BOTH SENSORS ARE SECURE TO COILS
• COMPRESSOR FAILURE
• COMPRESSOR OVERLOAD OPEN
• REFRIGERANT LEAK
• ODC SENSOR BROKEN OR LOOSE AT
BOARD CONNECTION
• HIGH PRESSURE SWITCH OPEN
- DIRTY CONDENSER COIL (COOLING)
- FAILED CONDENSER MOTOR (COOLING)
- BE SURE BAFFLES ARE INSTALLED (IF REQUIRED)
- REFRIGERANT RESTRICTION
- DIRTY FILTER / EVAPORATOR COIL (HEAT PUMP)
- EVAPORATOR MOTOR FAILURE (HEAT PUMP)
- RETURN / SUPPLY AIR RESTRICTED (HEAT PUMP)
• ALL ADDITIONAL SAFETYS ADDED TO UNIT SHOULD
BE CHECKED
42
RA
Figure 47 Display - Error Code
E 2
note
TURN OFF POWER TO DISPLAY
TURN OFF POWER TO DISPLAY
TURN OFF POWER TO DISPLAY
TURN OFF POWER TO DISPLAY
TURN OFF POWER TO DISPLAY
AUTO