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5. Error Code [61] (Fan Failure) is displayed.
Refer to the previous C-4 (Error Code [61]).
6. Error Code [21] (Malfunction of Air Intake Filter Switch) is displayed. (Indoor Model Only)
NO
YES
Replace Air Filter Switch Assy.
*5 Measure the voltage and resistance of connector .
Between both White wires:
Voltage: Less than 1 VDC
Resistance: 1 ohm
(Measure these after the air filter switch is ON.)
O
Is the
Air Filter Switch ON?
*5
Replace Burner Control Assy.
NOTE: When performing and/or servicing the water heater without front cover (opened),
operate it by pushing the air filter switch (ON).
Summary of Contents for PH-28RIFSN
Page 16: ...Operational Flow Chart Maintenance Information 16...
Page 18: ...18...
Page 19: ...MAINTENANCE INFORMATION SHOWN IN LED DISPLAY OF REMOTE CONTROL ABOVE 19...
Page 44: ...44...
Page 53: ...Schematic Disassembly PH 28RIFS 53...
Page 54: ...Schematic Disassembly PH 28ROF 54...
Page 55: ...Schematic Disassembly PH 28RIFS PH 28ROF 734 55...
Page 58: ...Schematic Disassembly PH 28CIFS 58...
Page 59: ...Schematic Disassembly PH 28COF 59...
Page 60: ...Schematic Disassembly PH 28CIFS PH 28COF 734 60...
Page 63: ...Schematic Disassembly PH 28RDVS 63...
Page 64: ...Schematic Disassembly PH 28CDVS 64...