SECTION II
TESTING AND TROUBLESHOOTING
© Midmark Corporation 2002 SF-1803 Page 2-18 Printed in U.S.A.
Code C661 SELECT
Code C662 FILL
Code C663 HEATUP
Code C664 STERILIZE
Code C665 VENT
Code C667 DRY
(Error Type: FATAL )
(Refer to column on left for
codes and description)
C66X: XXXXXX MODE
PRESSURE HARDWARE
UNPLUG / RE-PLUG UNIT
Pressure A / D converter
reports an average value
outside the limits for
normal operation during
specific mode.
Pressure Transducer or
Main P.C. Board Malfunc-
tioning.
Check for 5.0 VDC
between TP2 & TP4 &
pins of Pressure Trans-
ducer. (Refer to Sche-
matic in Section 5).
Voltage should be apprx.
4.5 VDC at all times with
unit plugged in. Also, run
Service Diagnostics.
If voltage is not present or Ser-
vice Diagnostics reveals a
problem replace P.C. Board
(Refer to para 4.13).
Code
C670.
(Error Type: FATAL )
Note: When a Code ends in
“0” it means unit had a sup-
ply power interruption.
The operator could have
unplug the unit when a previ-
ous Code was displayed.
Always go to Service Diag-
nostics and check previous 5
codes that are displayed.
C670: POWER UP MODE
PRESSURE OVERLIM
UNPLUG / RE-PLUG UNIT
Gauge pressure inside
chamber is greater than
34.8 PSIg (240 kPa) during
POWER UP mode.
May be due to a malfunc-
tion that occurred previ-
ously to Code displayed.
Go to Service Diagnos-
tics and check previous 5
displayed codes.
Refer to Code Numbers in
Troubleshooting Guide to
determine correction.
Vent Valve malfunction-
ing.
•Run Service Diagnostics
and check Vent Valve
Operation.
•If Vent Valve does not
operate check for line
voltage at terminals of
valve.
•If line voltage is present
but valve does not oper-
ate, disconnect power
from unit.
Disconnect leads from
Vent Valve coil and
check continuity.
115 VAC = 0.4 MOhms
230 VAC = 3.2 MOhms
(cold readings +/- 10 %)
If no continuity replace
valve.
Replace Vent Valve Assem-
bly (Refer to para 4.13).
Pressure Transducer or
Main P.C. Board Malfunc-
tioning.
Check for 5.0 VDC
between TP2 & TP4 &
pins of Pressure Trans-
ducer. (Refer to Sche-
matic in Section 5).
Voltage should be apprx.
4.5 VDC at all times with
unit plugged in. Also, run
Service Diagnostics.
If voltage is not present or Ser-
vice Diagnostics reveals a
problem replace P.C. Board
(Refer to para 4.13).
Code
C671.
(Error Type: FATAL )
C671: SELECT MODE
PRESSURE OVERLIM
UNPLUG / RE-PLUG UNIT
Gauge pressure inside
chamber is greater than
34.8 PSIg (240 kPa) during
SELECT mode.
Vent Valve malfunction-
ing.
•Run Service Diagnostics
and check Vent Valve
Operation.
•If Vent Valve does not
operate check for line
voltage at terminals of
valve.
•If line voltage is present
but valve does not oper-
ate, disconnect power
from unit.
Disconnect leads from
Vent Valve coil and
check continuity.
115 VAC = 0.4 MOhms
230 VAC = 3.2 MOhms
(cold readings +/- 10 %)
If no continuity replace
valve.
Replace Vent Valve Assem-
bly (Refer to para 4.18).
Table 2-3. Troubleshooting Guide
Problem Display / Symptom Probable Cause Check Correction
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