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Page SVC 820 Tankless Gas Trouble Shooting Manual
66
34 – Error Code
Explanation:
Ambient Thermistor malfunction
Diagnostic Checks:
•
Ambient Thermistor
AMBIENT THERMISTOR DIAGNOSTICS:
Turn power OFF. Remove 3 screws for Control Board
mounting bracket. Remove connectors “M”, “T” &
“G”. Pull Control Board out of way to access BLUE
Molex for Ambient Thermistor located near the
Blower Motor.
Turn power OFF. Remove connector “R” on Control
Board. Measure resistance between Black #3 & Blue
#7 wires: ‘Refer to Data Table for resistance value’. IF
OK, attempt to operate unit again. IF 34 Error Code
does NOT display, unit had a loose connection.
1
2
3
Separate top and bottom of BLUE
Molex for Ambient Thermistor. Top of
Molex has 2 black wires and 1 blue
wire. Bottom of Molex has 2 black
wires. Continue to Diagnostic Chart
on next page.
Screws
Bottom of Unit
Control Board
Blower Motor
Molex Connectors
Ambient Thermistor Data Table
64DV; 84DV; 95DV:
7K – 23K Ohms
64X; 84X; 95X:
2K – 72K Ohms
H95DV; H95X:
2K – 72K Ohms
Summary of Contents for PH2-20R DVSN
Page 158: ... 158 Schematic Disassembly PH2 20RDVS PH2 25RDVS PH2 28RDVS ...
Page 159: ... 159 Schematic Disassembly PH2 20RDVS PH2 25RDVS PH2 28RDVS ...
Page 160: ... 160 Schematic Disassembly PH2 20RDVS PH2 25RDVS PH2 28RDVS ...
Page 162: ... 162 Schematic Disassembly PH2 20ROF PH2 25ROF PH2 28ROF ...
Page 163: ... 163 Schematic Disassembly PH2 20ROF PH2 25ROF PH2 28ROF ...
Page 164: ... 164 Schematic Disassembly PH2 20ROF PH2 25ROF PH2 28ROF ...
Page 166: ...Schematic Disassembly PHH 32RDV PHH 25RDV 166 ...
Page 167: ...Schematic Disassembly PHH 32RDV PHH 25RDV 167 ...
Page 169: ... 169 Schematic Disassembly PHH 32ROF PHH 25ROF ...