Kaisai 06RY1, Service Manual

Page: 101 / 114

M thermal Mono
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4.22 bH Troubleshooting
Digital display output 4.22.1
Description 4.22.2

PED PCB failure

Split stops running.

Error code is displayed on hydronic box main PCB and user
interface.
Possible causes 4.22.3

Power supply problem.

PED board broken.

IPM module broken.
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Procedure 4.22.4
bH
Power supply problem. After 5
minutes of power-off interval,
power on again and observe
whether it can be recovered.
Yes
Increase the power voltage to the
required range.
No
PED
1
board broken.
Yes
Replace PED PCB and power on again.
No
IPM module broken.
Yes
Replace IPM module and power on again.
Notes:
1. PED is port CN22 on the hydronic box main PCB (labeled 11 in Figure 4-
KHC -12(14,16)RY3
B outdoor unit inverter module ).
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